Free Download: 100 Open Source Apps for Windows

51. aMSN

This MSN Messenger clone includes offline messaging, voice clips, custom emoticons, and more. It also offers webcam support and works with multiple languages.

52. Miranda IM

This IM client’s claim to fame is its small file size, which also makes it fast. Miranda IM supports most common chat networks, including AIM, IRC, Jabber, MSN, Yahoo, and, many more.

53. Psi

Psi is an open-source IM client for the Jabber network, which includes GoogleTalk, LiveJournal, and a number of international networks. It’s completely customizable and supports about 20 different languages.

Miscellaneous

54. FreeMind

FreeMind mind-mapping software makes it easy to create a diagram or picture that shows how words or concepts are related. It’s a great tool for brainstorming or problem-solving. Check out the screenshots on the Web site to get a better idea of how it works.

55. andLinux

If you want to try out some Linux applications, but you aren’t quite ready to give up Windows, andLinux is for you. It lets you run Ubuntu Linux from any Windows 2000 or later system. Note that you’ll need plenty of memory and free disk space in order to make it work.

56. OpenDisc

Don’t want to take the time to download lots of individual open-source programs? OpenDisc combines a couple dozen of the most popular open-source apps for Windows (including many of those on our list) into a single download. For a fee, you can also receive OpenDisc on a disk.

57. Sweet Home 3D

Feeling inspired to redecorate? Sweet Home 3D lets you create a 2D floorplan and then see what it will look like in 3D.

58. PhpGedView

Working on your family tree? PhpGedView makes it easy to collaborate online with the rest of your family to trace your genealogy.

Multimedia Tools

59. XBMC Media Player

Winner of multiple awards, XBMC plays virtually any type of video, audio, or photo file, as well as organizing media files with its library management system. The controls are intuitive and the overall look is very visually appealing. It also works on OS X and Linux, and even XBOX.

60. MMConvert

Need to convert an audio or video file to a different type of file format? MMConvert will do the job for you. Supported file types include asf, wmv, wma, avi, mp3, wav, mkv, mka, and ogg.

61. VLC Media Player

VLC Media Player works both as a multi-media player and a server for streaming audio or video. It supports most operating systems and most media file types.

62. Data Crow

Do you have a huge collection of books, music, movies, software, or anything else? Are friends always borrowing your stuff and conveniently “forgetting” to return it? Data Crow makes it easy to set up a catalog of what you have and who borrowed it. It also connects to online services like Amazon.com and Imdb.com to provide information about your media collection.

63. MediaInfo

MediaInfo finds tags and technical data for audio and video files, as well as some text files. It supplies the title, artist, director, number of tracks, and much, much more.

Office Productivity

64. OpenOffice.org

One of the most well-known open-source packages available, OpenOffice.org includes a word processor, spreadsheet, presentation creator, and database that are all fully compatible with their Microsoft counterparts. In addition, this suite also includes a drawing tool and a mathematical equation creator.

65. PortableApps.com

PortableApps.com provides a suite of popular programs, including OpenOffice.org, Firefox, Thunderbird, Pidgin, and several others, that you can save to a USB thumb drive, portable hard drive, or even your iPod. If you need to use a computer other than your own, just plug in your drive, and portable apps gives you access to all these programs, as well as remembering your settings, bookmarks, and e-mail accounts.

PDF Tools

66. PDF Split and Merge

The name says it all—this tool lets you split existing PDFs into smaller files or merge pieces of existing files to create a single document. The enhanced version (available for a fee) adds encryption capabilities.

67. PDFCreator

With PDFCreator you can make a PDF file out of nearly any Windows document. As a bonus, it also creates tiff, bmp, eps, and several other types of files as well.

68. Sumatra PDF

Think it takes too long to launch Adobe Acrobat Reader? Sumatra is a simpler, smaller program that also lets you view PDF files.

Project Management

69. OpenProj

Now owned by Serena, OpenProj is a replacement for Microsoft Project that opens Project and Primavera files and includes very similar features. It supports multiple languages and is used in more than 142 countries.

70. GanttProject

GanttProject lets you create Gantt charts, assign resources to a task, and track progress with a variety of reports. For convenience, files can be imported from or exported to Microsoft Project.

Religion

71. Xiphos

Formerly known as GnomeSword, Xiphos is an open-source Bible study application. You can search text, consult commentaries, look up maps, and more.

72. BibleTime

BibleTime offers the same functionality and the same resources as Xiphos, but with a different interface. Try them both and see which you like better.

73. Noor

Noor doesn’t offer a lot of bells and whistles, but it does let you access the text of the Quran from your PC. It includes both the original Arabic and translations.

Remote Access

74. UltraVNC

UltraVNC lets you display the screen of another computer on your screen. Designed for help desk operations, it’s also great for accessing your home PC from work or for helping those relatives in other states who are always calling you for computer help. Features include text chat, file transfer, optional encryption, and more.

Security

75. KeePass Password Safe

If you use the same password for all of your accounts, you’re asking for trouble. KeePass makes it easy to assign different passwords to different accounts, and it remembers them for you, so you still only need to remember one master password.