FreeSMUG stands for "Free Open Source Software Mac User Group." In addition to forums, tutorials, videos and other resources, this group maintains a very extensive directory of open source projects that run natively on OS X.
This bare-bones site features nothing but a directory of Java-based open source projects. It's particular strong on developer tools.
Made for developers, this directory provides open source code that serves a variety of purposes. It's categorized by language as well as by function.
This site limits itself to "sufficiently developed and stable open source applications that are ready for deployment." It contains nearly 900 downloads and also provides links to recent open source news.
35. EOS Directory
The Enterprise Open Source Directory, now owned by the Open Source Business Foundation, includes 260 projects that it deems "enterprise-ready." It also provides user and expert ratings as well as rankings of projects' functionality, maturity, community and more.
This wiki-style site, funded by VirtualORGS, offers a good directory of open source software, as well as a number of pages dedicated to the philosophy and history of the open source movement. It also links to a directory of commercial open source software.
In addition to developing half a dozen projects of their own, this group has put together a list of open source software of interest to researchers and science educators. It's particularly rich in apps related to math and chemistry.
This project collects a wide variety of open source projects for Windows into a single download. The "Programs" tab at the site lists all the individual applications in the download and links to their sites so that you can also download the apps separately.
Windows users can take some of the best open source apps with them on a portable thumb drive when they download this collection. You can also download portable versions of each included app separately.
From this site, you can download five different collections of open source apps for Windows2GB, Essential, Game, School and Webeach of which fits onto a portable thumb drive. The site also contains links to each of the individual apps included.
All right, we'll admit it, this entry is a little self-serving. Datamation publishes "best of" lists for various categories of open source software every couple of weeks or so. Enter "open source software" in the search bar to find some of the most recent.
43. Bossie Awards
Every year, InfoWorld hands out "Best of Open Source Software", aka Bossie, Awards to the projects it judges to be most deserving in each category. In addition to the most recent winners, you can also search through past years' winners.