Thursday, December 14, 2006

Generate Passwords

A free but high-powered password generator

You're reading Windows Secrets, so it's a good bet that you already know the importance of having good passwords. Or, to put it the other way around: You know that using a simple, easy-to-guess password is like leaving your spare house key under the doormat. It won't fool anyone who wants in.

I've recently run across a couple of new (and free) online password services that you may find useful.

1. PassNerd. I can only give a limited thumbs up to PassNerd. Every time you load the PassNerd home page, the site generates a new password for you. You can select simple or complex passwords (complex is better) in lengths up to 64 characters (longer is better).

The site is easy to use and the passwords appear to be quite random, but other parts of the site give me pause. The Tips section, for example, recommends "alphabet math" and "keyboard transposition" as good ways to generate your own passwords.

Both these techniques are relatively low-security, because the common substitutions of numerals for letters are now built into modern cracking tools. They are emphatically not strong ways to produce passwords! (For more info, see "Looks Strong, But Don't Be Fooled!" from the 2005-06-23 issue of the LangaList.)

2. Perfect Passwords. By contrast, I can give an unequivocal recommendation to Steve Gibson's Perfect Passwords. You can see why as soon as you read the background information on that page.

In particular, Steve's use of SSL encryption to deliver the generated passwords to you helps ensure that you and you alone will see the results, and that the results will be cache-resistant. (In fact, in most systems, the pages won't be cached at all.)


Perfect Passwords

By default, Steve's page produces passwords of 63 and 64 characters. If you need a longer password, you can splice several of the 63-character passwords together. If you want a shorter password, you can copy only the number of characters you need. (While you're on the site, check out Steve's list of other free tools, too.)

If you don't need extremely long passwords that would survive weeks of brute-force attack by a supercomputer, you might prefer to use a "passphrase" technique. This allows you to create easy-to-remember passwords that are strong and as short or as long as you wish. For details, see my InformationWeek article entitled "How To Build Better Passwords."

How To Fix A Missing DLL

How to fix an AWOL Shell.dll

Reader Rick Granlund has a problem that's bad enough in itself, but which also could be a symptom of a deeper issue. Either way, it's fixable:

* "I have a problem that may be common and yet the cure eludes me. When I attempt to install software in my XP Pro SP2 machine, I get the dialog box 'Missing SHELL.DLL.' How do I find and reinstall the SHELL.DLL with minimum disruption to my system?"

The fix is easy, Rick, but first — it'd be best if you could find out why Shell.dll disappeared.

For example, there's a fairly common browser hijacker that can cause this problem. You didn't mention any other symptoms, but the hijacker usually adds "Home Search Assistant," "Shopping Wizard," and "Search Extender" to your system, and may also reset your browser's home page so that a popup appears at every start.

If malware such as this is working on your system, then it will do no good to repair Shell.dll because the malware will simply corrupt the new copy.

I suggest you begin by using your favorite antimalware tools to make sure your system is squeaky clean and free of all malware. Major test labs currently rate Webroot's Spy Sweeper and PC Tools' Spyware Doctor as the best antispyware products. For more information, see the Security Baseline page at WindowsSecrets.com.

If "Home Search Assistance" and its related friends are, in fact, causing your problem, the free AboutBuster utility can remove them.

Once you're sure your system is clean, you can download a fresh copy of Shell.dll from any number of online sources. DLL-files.com, for example, has a good Shell.dll page. Copy the DLL file into your DLLcache folder (usually found at C:\Windows\System32\DLLcache). Then re-register the DLL this way:

Step 1. Click Start, Run.

Step 2. In the Run dialog box, enter (change C:\Windows to the correct location on your system):

regsvr32 C:\Windows\System32\DLLcache\Shell.dll

Step 3. Click OK.

Step 4. Reboot, and your Shell.dll problems should be fixed!

By the way, the above steps can resolve a huge number of problems with other missing/corrupted DLLs. Just use the example above as a template, downloading whatever DLL you need and substituting its name in the regsvr32 command.

Thursday, December 07, 2006

Make Your Own Ringtones

Personal Zing in Your Ring

Q. Is there an easy way to make a ring tone for my phone from a CD track or MP3 file?

A. Making your own ring tones isn’t too difficult if you have a mobile phone that supports MP3 ring tones and a way to transfer files onto the phone from your computer. If you’re not sure about either, check your phone’s manual or wireless carrier’s Web site for the technical specifications for your phone model.

One of the simpler ways to make and install your own ring tones is to use software dedicated to the task. Programs like ToneThis (free at www.tonethis.com) for Windows or Xingtone Ringtone Maker for Windows and Mac OS X (xingtone.com; $20 to buy, free trial available) are options.

These types of programs let you edit the sound clip of your choice to the appropriate length and send it to your phone as a file download that you can assign as a ring tone. Most ring tone software makers list phone models and carriers on their Web sites so you can make sure your handset is compatible.

You may also be able to convert and edit a CD track or MP3 file with free or inexpensive audio programs available around the Web if your computer doesn’t have any sound-editing software already installed. Audio Shareware sites like HitSquad (www.hitsquad.com) and Audio Utilities (www.audioutilities.com) are two such sites. The open-source program Audacity (audacity.sourceforge.net) is a free audio editor for Windows, Mac OS X and Linux systems, but you need to download the program’s optional LAME MP3 encoder to export edited MP3 files.

Once you have edited your new ring tone with your audio program, you can transfer it to your phone as you do other files — U.S.B. cable, Bluetooth connection and e-mail download are some methods available. Check your phone’s manual for instructions on transferring audio files to the proper place for use as ring tones.

Are You Vista Ready?

--------------------------------------------------------------------------------

December 7, 2006
Basics
Vista Is Ready. Are You?
By LARRY MAGID
WINDOWS VISTA, the latest iteration of Microsoft’s operating system, is finally here. It was officially released to corporate users last week and will be available to consumers on Jan. 30. But now that Vista is ready, will your computer be? And what will be involved in an upgrade?

Microsoft says Vista offers increased security, along with an improved search function, an excellent calendar program, improved networking and a sidebar with quick access to mini-programs called gadgets. With the right display adapter, some editions of Vista will also offer a new interface called Aero that lets you preview what is inside a running program by placing your cursor over its thumbnail in the task bar.

It will be possible for many PC users to spend $99 to $259 to purchase a Vista DVD to upgrade their existing Windows XP machines. But before you do that, you need to take a good look at your PC as well as your peripherals and software. If your system isn’t quite compatible, it might be possible to make it ready for Vista with some additional memory or perhaps a new video card.

Even if your PC is Vista-ready, that doesn’t mean you should buy the upgrade kit. For most users, especially those whose hardware isn’t quite up to speed, it might make sense to wait until it’s time for a new PC.

The easiest way to get Vista is to buy a new PC after Jan. 30. If you want a new PC sooner, make sure the hardware is Vista-ready and see if the vendor is offering a coupon for a free or low-cost upgrade when Vista comes out. It is essential to compare the cost of buying a new system against purchasing Vista and upgrading your current PC. By the time you add up the cost of Vista plus any required hardware, it might be make more sense to get a new machine.

One variable for those thinking of upgrading is Vista’s system requirements, which vary by edition. Microsoft will offer a $99 Home Basic Edition that provides limited functionality but runs on more basic equipment. Unlike the higher-end versions, Home Basic won’t support the new Aero interface.

The minimum configuration to run the Home Basic Edition of Vista is a PC with 512 megabytes of memory, at least an 800-megahertz processor and a graphics card that is DirectX9-compatible; this includes most graphics adapters sold in the last few years. In other words, a vast majority of PCs that have been purchased in recent years are able to run this stripped-down version of Vista — but just because they’re able doesn’t necessarily mean it’s worth the cost, effort and potential compatibility problems with existing software and peripherals.

Most consumers will find the $159 Home Premium edition more suitable. It includes the Aero interface along with Windows Media Center (to manage audio and video resources) and other features. The minimum hardware for the Premium edition is a gigabyte of memory and a one-gigahertz processor. You’ll also need DirectX 9 graphics with a Windows Vista Display Driver Model (WDDM) driver and at least 128 megabytes of graphics memory and pixel shader 2.0. Pixel shader refers to the ability of your graphics processor to render the surface properties of an image including lighting, shadows and other visual qualities.

Your machine must also have at least a 40-gigabyte hard drive with 15 gigabytes of free space as well as a DVD-ROM drive and audio output. While you can never have too much memory, Microsoft’s Vista group product manager, Greg Sullivan, said that one gigabyte was plenty. I’ve been running Vista on a 1.5-gigabyte machine and haven’t had any memory-related problems.

If your machine has Windows XP, an easy way to find out if it’s Vista-ready is to download the Windows Vista Upgrade Advisor from Microsoft’s Vista Web site (www.microsoft.com/windowsvista/getready). The program, which is available now, will scan your PC to determine which edition of Vista, if any, can run on your machine.

Be sure to plug in all your external peripherals, like printers, scanners and external hard drives, as they, too, need to be evaluated by the upgrade tool. When the upgrade adviser scan is finished it will tell which edition it recommends. You don’t necessarily have to buy the recommended edition. To the left of the screen is a list of other editions. Click on the ones you’re considering and scroll down to see what changes you might have to make to run that edition.

Don’t panic if the upgrade adviser finds that some of your device drivers aren’t Vista-compatible. Chances are there are new drivers available to fix the problem. Microsoft has included many drivers within the operating system so, if all goes well, it will take care of making sure that your display adapter, sound card, printer, Ethernet card and other devices have the software they need to operate correctly.

But the list of included drivers is not exhaustive. Very old, very new and relatively obscure hardware might not be included, so to be safe, before you install Vista, visit the Web site for each of your hardware vendors to download the latest Vista drivers. The upgrade adviser looks for minimal, not optimal requirements.

For the Aero interface, the video card or Graphics Processing Unit (G.P.U.) is the most important component. The chips on that card (or on your PC’s system board) do the heavy lifting when it comes to displaying images on your monitor. Vista’s Aero interface, according to Rob Csongor, vice president of Nvidia, a leading maker of chips for computer graphics, is especially taxing on video processors because of the way it renders windows.

The use of Vista’s Flip 3-D window changer, for example, requires the video card to render a 3-D image of all of your open windows every time you press Alt Tab. The Windows desktop, according to a Microsoft Web site, “will be dynamically composed many times a second from the contents of each window.”

Even if your graphics card is Aero-compatible, you may still want to upgrade for faster performance. In my tests, a three-year-old Aero-compatible card from ATI (now part of Advanced Micro Devices) was noticeably slower than newer, moderately priced (about $130) cards from both ATI and Nvidia. I noticed it and so did the Windows Experience performance scanning program that comes with Vista.

If you have a desktop PC with a graphics card that’s not up to the task, you can replace the card with one that is Vista Aero-ready, and if your PC system board has an embedded graphics system, it may still be possible to add an external card. If you have a notebook PC whose graphics processor isn’t Vista-ready, you’re pretty much out of luck because, other than adding additional memory, it’s generally not possible to upgrade internal components of a laptop.

Another way to improve performance is to use a U.S.B. thumb drive or SD card to take advantage of Vista’s ReadyBoost feature. Vista uses that memory to store some of your program code so that programs load much faster than if it had to load from the hard drive.

Whether or not your machine is compatible, upgrading an operating system can be challenging despite Microsoft’s efforts to make it as smooth as possible. You should definitely back up your data files before starting. You have the choice of doing an “in place” upgrade, which retains your applications and data files, or a “full install,” which requires you to reinstall your programs.

A full install by default will not delete your data, though it may make the data more difficult to find. It often results in a faster and more reliable system because it cleans up the Windows registry and deletes any spyware and possibly problematic software on your machine.

And if you’re reluctant to upgrade, don’t fret. If Windows XP works for you now, it will continue to work long after Jan. 30. Besides, Vista isn’t going away anytime soon. Whether you want to or not, you’ll probably be using it on your next PC.



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Wednesday, December 06, 2006

Add Encrpyt Command To Context Menu

How to add the Encrypt/Decrypt command to the right context menu
Want to be able to right click a file or folder and select to encrypt or decrypt it, without having to click through the Properties | Advanced dialog boxes? You can do it by editing the registry. Here's how:

1. Open your favorite registry editor.
2. Navigate to this entry: HKEY_LOCAL_MACHINE \ Software \ Microsoft \ Windows \ CurrentVersion \ Explorer \ Advanced
3. In the right details pane, right click an empty spot and select New, then DWORD Value.
4. Name the new value EncryptionContextMenu.
5. Double click the new value, and in the data value box, enter 1.
6. Click OK and close the registry editor.
7. Restart the computer for the new setting to take effect.

Sunday, December 03, 2006

LCD or Plasma

LCD or Plasma? Consider Size, Weight, Glare

Rob Pegoraro
Sunday, November 26, 2006; F04



Over this year, one of the biggest obstacles to buying a high-definition TV crumbled into dust. Even if you're looking for a big, flat-panel plasma or a liquid-crystal display screen, you no longer have to spend more than the cost of a good laptop computer.

But as flat-panel TV prices have deflated by anywhere from a third to half, choosing the proper set hasn't gotten much easier. Depending on whom you talk to, either plasma is the sole sensible choice, or only a fool would pick that over LCD.

True, there are real differences behind the techno-zealotry. That became clear during lengthy trials of four televisions selling for no more than $2,000 and change.

Two were 40-inch LCDs: Sony's KDL-V40XBR1 and Samsung's LN-S4041D. The other two were 42-inch plasmas: Panasonic's TH-42PX600U and Philips's 42PF9631D.

None of these issues emerged as a tragic flaw in the test runs. They're just things to weigh against your priorities and needs.

Start with where that new HDTV will go. If the area won't accommodate a set above a certain size, that alone could drive the decision. LCD is the only flat-screen option that comes in sizes smaller than 37 inches across, but it gets prohibitively expensive for anything bigger than 46 inches.

(Flat-panel alternatives have their own size limits. Conventional tube TVs max out at 34 inches, while "microdisplay" sets -- the projection sets that measure a foot or more thick and go by names like "DLP," "rear-projection LCD" and "LCOS" -- usually can't be had under 46 inches.)

With a TV size in mind, see how much light comes into the room. If a houseplant thrives on the windowsill, an LCD is probably best. LCDs are generally brighter and less prone to glare than plasma.

Then, consider the spots from which people might watch TV. Plasma sets offer the widest viewing angles, followed by LCDs; once you move past 45 degrees or so from straight on, an LCD can start to look a little pale. (Most microdisplays, meanwhile, have more limited viewing angles than either plasma or LCD.)

Next question: Will a computer or video game console be plugged into the HDTV? If so, avoid plasma TVs unless you can accept "temporary image retention." On both plasmas, keeping a static image on the screen -- for instance, the Windows desktop or a TV programming guide -- for an hour left a faint after-image that lingered for maybe another hour before fading away.

Finally, will the TV hang on a wall or from a ceiling -- or will it just get lugged up the stairs? LCDs are a lot lighter than plasmas: The Samsung LCD, at 46.5 pounds, was less than half as hefty as the Philips plasma.

If all those factors still allow you to pick either plasma or LCD, plasma should offer slightly better picture quality. It allows for greater contrast, a deeper range of blacks and faster "refresh rates" (for instance, a fast-moving ticker on ESPN was clear on the Philips plasma but smeared slightly on the Samsung LCD).

To minimize those disadvantages on an LCD, look for a set with the highest possible "dynamic contrast ratio" (4,000:1 or higher) and the quickest refresh rate (8 ms or fewer).

Plasma has a reputation for being less efficient, but tests with a power meter didn't bear that out: The Panasonic used about the same amount of electricity over an hour as either LCD -- though the Philips plasma drew about 25 percent more juice.

With any HDTV, keep a few features on your shopping list. Make sure the TV has a digital tuner and is not just a monitor. With an antenna, that tuner will offer crisp, clear, high-definition broadcasts for free -- if nothing else, a fantastic backup for cable or satellite. (This is the biggest secret of HDTV: It makes over-the-air broadcasts relevant again.)

Unfortunately, not all digital tuners are as capable. The Sony, Samsung and Panasonic sets delivered good to excellent reception, but the Philips would lose the signal if I looked at it the wrong way.

Equally important: a full set of video inputs. High-definition video comes in via two connectors: digital HDMI (high definition multimedia interface) and analog component video. Get a TV with two of each kind, plus a VGA (analog) or DVI (digital) port if a computer will be plugged in.

Some HDTVs include a convenient extra -- a memory-card reader or USB port to show off digital photos.

Lastly, don't pay a cent extra for "1080p" resolution. Ads calling it "true" or "full" high-definition overlook two inconvenient facts: No broadcast, cable or satellite service offers that resolution, and you probably won't see the difference from your couch on a screen smaller than 50 inches.

30 Free Windows Apps

Recently, I received a fresh new laptop from Dell. Upon receiving it, I did the traditional “installation of Windows from scratch” on it to remove a lot of the garbage that is preinstalled on Dells. Then I got really busy installing tons of great software that takes care of pretty much every software need I have. Not only was all of the software free, every piece of it was open source, which means that the code is peer-reviewed; no spyware here!

What follows is a list of thirty pieces of software that are the cream of the crop of open source software for Windows. Not only is every piece of it free, almost all of them directly replace expensive software packages.

Now, if only there were an open version of The Sims 2, I might go the whole way and switch to Linux…

Firefox logo1. Firefox
http://www.getfirefox.com/
Replaces Internet Explorer
If you haven’t switched to Firefox for your web browsing needs, do it now. It stops annoying popups and it has tons of amazing plugins that can make surfing the web even better. I could evangelize all day about Firefox, but one thing’s for sure: the first thing I do on any new Windows machine is run Internet Explorer just long enough to download Firefox.

2. Thunderbird
http://www.mozilla.org/thunderbird/
Replaces Microsoft Outlook or Eudora
Thunderbird is an email client that has five big things going for it: it’s free, it’s full featured, it’s lightweight and runs quick, it has an unparalleled spam filter, and it protects you from those ridiculous phishing attacks by clearly indicating which emails send you to a bogus website. If you’re not already using a web-based email solution, Thunderbird should be your client.

3. Sunbird
http://www.mozilla.org/projects/calendar/sunbird/
Replaces Microsoft Outlook’s calendaring functions
Might as well get the Mozilla trifecta out of the way by mentioning Sunbird, which is the Mozilla Foundation’s calendaring program. It’s extremely easy to use (I figured out everything I needed in a minute or two) and easy to share your calendar with others. I consider a calendaring tool to be essential if you’re using a laptop, and this is no different.

4. Abiword
http://www.abisource.com/
Replaces Microsoft Word
Want a good word processor but find Microsoft Word too expensive? AbiWord is my favorite replacement for Word. It’s lightweight (meaning it runs quickly) and includes pretty much every feature that I use regularly in a word processor, plus it can save files in formats that you can exchange with Word and WordPerfect users, plus open any of their files, too.

OpenOffice logo5. OpenOffice
http://www.openoffice.org/
Replaces Microsoft Excel and Microsoft PowerPoint
If you want to replace the rest of the Office suite, your best bet is OpenOffice. It includes very nice replacements for Excel and PowerPoint (and workable replacements for Access and other Office elements). In fact, I actually prefer their Excel and PowerPoint replacements to the real thing.

6. ClamWin
http://www.clamwin.com/
Replaces Norton AntiVirus or McAfee
ClamWin is a slick anti-virus software that’s quite easy to manage and is unobtrusive while keep your system free of viruses. That’s pretty much all I want from a package, so why pay money for McAfee to keep bugging me all the time?

Gaim logo7. Gaim
http://gaim.sourceforge.net/
Replaces AIM, Windows Messenger, etc.
This is a very clean instant messaging program that allows you to be on AOL Instant Messenger, Windows (MSN) Messenger, and Yahoo Messenger simultaneously with one program. There are other free packages that do this, but Gaim is stable and clean and simple.

8. BitTorrent
http://www.bittorrent.com/
Original but essential
From their website, “BitTorrent is a peer-assisted, digital content delivery platform that provides the fastest, most efficient means of distributing, discovering, and consuming large, high-quality files on the Web. Our mission is simple: to deliver the content that entertains and informs the digital world.” In other words, BitTorrent allows you to download large media files and also use your bandwidth to help others download these files. Search for media files you want and download ‘em.

9. GIMPShop
http://www.gimpshop.net/
Replaces Adobe Photoshop
This is a version of the GNU Image Manipulation Program that does a pretty solid job of imitating Adobe Photoshop - a regular user of Photoshop (like me) can adapt to it quite quickly. It’s very richly featured and runs quite well - in fact, I see no reason to ever go back, even if Photoshop were free.

10. Gnucleus
http://www.gnucleus.com/Gnucleus/
Replaces LimeWire, BearShare, etc.
Sure, LimeWire and BearShare are free, but why not just get the same basic software without all of the spyware? Gnucleus is pretty much identical to those software packages - but without all that extra junk that slows down your computer.

11. VLC Media Player
http://www.videolan.org/vlc/
Replaces Windows Media Player, Quicktime, RealPlayer, etc.
If you get tired of having tons of media players on your computer, get this package that runs pretty much every media type you’ll run across without breaking a sweat.

Juice logo12. Juice
http://juicereceiver.sourceforge.net/
Unique but essential
Juice lets you effortlessly subscribe to podcasts, organize them, and listen to them at your convenience. In conjunction with PodNova, I find it easier to use Juice to organize podcasts than using iTunes itself.

13. Audacity
http://audacity.sourceforge.net/
Unique but essential (for some)
If you’re interested in recording your own podcast (or just want to make your own voice recordings for whatever reason), Audacity and a microphone are pretty much all you need to get the job done. I’m not much for podcasting (let’s just say I don’t have a radio voice), but I use Audacity for other voice recording purposes.

RSSOwl logo14. RSSOwl
http://www.rssowl.org/
Unique but essential
RSSOwl is one of many open source RSS readers. In other words, it enables you to use one program to keep track of the content of a lot of different blogs; if you read a lot of blogs, it’s the only way to keep tabs on all of them without devoting hours jumping from site to site. If you have a laptop, it’s preferable to using sites like Bloglines, but if you’re on a desktop, a web-based feed manager might be better.

15. Filezilla
http://filezilla.sourceforge.net/
Replaces WinFTP
Many people occasionally have a need to FTP files to other computers; if you ever have the need to transfer files in such a fashion, FileZilla will do the job slickly and quickly.

16. Keynote
http://www.tranglos.com/free/keynote.html
Unique but essential
Keynote is basically designed specifically for the task of taking notes on a laptop. If you ever find yourself in a meeting or a presentation with your laptop open and want to jot down notes and organize them just a bit, Keynote is unquestionably the program for you. It’s not good at quality word processing, but that’s not the point. In my professional work, I find myself using Keynote almost as often as any other utility.

17. MusikCube
http://www.musikcube.com/
Replaces iTunes
If you’re not already committed to downloaded music from the iTunes Music Store, then MusikCube is the best choice available for a music organizer and player. It organizes your mp3s, makes it really easy and really fast to find them, and allows you to make some incredibly clever smart playlists.

18. Handbrake
http://handbrake.m0k.org/
Unique but essential
Handbrake enables you to stick a DVD in your DVD drive and have the contents of that film stored to your hard drive in a form that can be read by pretty much any media player. I often use it to put a few movies on my laptop for travel purposes, so I don’t have to worry about keeping track of DVDs while on the road.

19. X-Chat 2
http://www.silverex.org/
Replaces mIRC
X-Chat is a free IRC client. For those unfamiliar with IRC, it’s a place for technical people (and, as my wife loves to point out, nerds) to meet and discuss topics in an open environment. I often find it very useful when piecing through difficult technical issues.

KeePass logo20. KeePass
http://keepass.sourceforge.net/
Unique but essential
KeePass is a program that securely stores and manages the abundance of passwords we all use on a daily basis. I have literally hundreds of usernames and passwords spread out all over the place; KeePass keeps them all for me and keeps them safe.

21. TrueCrypt
http://www.truecrypt.org/
Unique but essential
TrueCrypt enables you to convert a memory stick into a strongly encrypted data storage device, meaning that you can store personal data on it without worrying about losing it and having personal information get out and about. I use it to keep some of my most personal data off of my laptop and strongly secured, just in case.

22. PDFCreator
http://sourceforge.net/projects/pdfcreator/
Replaces Adobe Acrobat
PDFCreator creates a virtual printer on your computer that, if you print a document to it from any program, creates a PDF of that document that can be read on any computer with Acrobat Reader on it. After installing PDFCreator, all you have to do is print like normal and out comes a PDF!

23. Freemind
http://freemind.sourceforge.net/
Unique but Essential
Freemind is a “mind mapping” software program. In essence, it enables you to brainstorm and link together ideas quickly, creating “maps” of concepts similar to what you might do on a whiteboard. I find it incredibly useful when putting together ideas for new posts or planning small projects or assembling the backbone of a writing project.

24. NASA Worldwind
http://worldwind.arc.nasa.gov/
Replaces Google Earth
WorldWind is very similar to Google Earth in that it allows you to browse the globe. While it isn’t strong for creating maps (but why not just use Google Maps for that?), it is utterly incredible for viewing three-dimensional landscapes of any place on earth.

25. Notepad2
http://www.flos-freeware.ch/notepad2.html
Replaces Notepad
Notepad2 is a replacement for the traditional Windows Notepad that just adds a few sweet little features: multiple documents; line, word, and character counts; and some highlighting of tags. In fact, I’m using Notepad2 as I draft this post (after using Freemind to organize it).

26. HealthMonitor
http://healthmonitor.zucchetti.com/
Unique but useful
HealthMonitor enables you to keep an eye on the health of your computer. It identifies slowdowns and other system issues quickly and lets you know (for example, it gives a popup if your system memory gets to a certain percentage of fullness, or if your hard drive has only 10 GB free). This can keep you out of trouble and also give you clues to problems your machine might be having.

27. Workrave
http://www.workrave.org/
Unique but useful
Sometimes late into a writing session, my wrists get sore from too much repetitive movement. Workrave basically jumps in before this happens and locks down the computer for a while, preventing me from working too much and causing repetitive stress injury. Since I’ve started using it, it hasn’t significantly hurt my productivity at all and my wrists are thanking me!

28. GanttPV
http://www.pureviolet.net/ganttpv/
Replaces Microsoft Project
If you do any project management (or have a need to dip your toes in the water), GanttPV does a brilliant job of managing the task quickly, easily, and freely. If you need to move to MS Project later, you can export from GanttPV to Project, but once you start digging into GanttPV, you’ll likely have no reason to use Project.

29. GnuCash
http://www.gnucash.org/
Replaces Microsoft Money or Quicken
GnuCash is a slimmed-down version of the bloated Microsoft Money and Quicken packages, but it contains all of the features I want for managing my money. The interfaces are incredibly simple - it functions much like a checkbook ledger on your computer - but there’s a lot of meat hidden throughout the software.

30. True Combat: Elite
http://www.truecombatelite.net/
Replaces Quake IV, Halo, etc.
After all this downloading, you’re going to need to blow off a little steam, and I’ve yet to find a more enjoyable free game than this one. It’s basically a third person combat game, but the graphics are spectacular and the game is quite engrossing.

If you’ve downloaded and installed all of these, you’ve got access to all the productivity software you’ll likely need, clean and open and best of all free.