Anonymous Pro is a set of four TrueType fonts for Mac OS, Windows, and Linux released under the SIL Open Font License.

The Khan Academy is a not-for-profit 501(c)(3) with the mission of providing a world-class education to anyone, anywhere. Despite being the work of one man, Salman Khan, this 1600+ video library is the most-used educational video resource as measured by YouTube video views per day and unique users per month. We are complementing this ever-growing library with user-paced exercises--developed as an open source project--allowing the Khan Academy to become the free classroom for the World.

With 500 million members and an ambition to push people towards public sharing, Facebook is probably not the best place to post and share photos of you napping at your desk or partying hard at last night’s booze fest. Enter The Fridge, a YCombinator-backed startup that promises a Facebook-like experience for private groups.

Create Synchronicity is a powerful and lightweight open source backup and synchronization program, available in many languages.

The Share Bookmarklet makes it easy for you to share any webpage on Twitter, even if there isn’t a Tweet Button. It works in all major browsers and is easy to install.

The koans are broken out into areas by file, hashes are covered in about_hashes.rb, modules are introduced in about_modules.rb, etc. They are presented in order in the path_to_enlightenment.rb file. Each koan builds up your knowledge of Ruby and builds upon itself. It will stop at the first place you need to correct. Some koans simply need to have the correct answer substituted for an incorrect one. Some, however, require you to supply your own answer. If you see the method __ (a double underscore) listed, it is a hint to you to supply your own code in order to make it work correctly.

GNU social, true to the Unix-philosophy of small programs to do a small job, will be a decentralized social network that you can install on your own server What if you could authorize your server to reveal as much, or as little information about you to other sites, as you wish... one time, one day, or forever?

Applying computer gaming ideas to a todo list.

Accidentally deleted an important file? Lost something important when your computer crashed? No problem! Recuva recovers files deleted from your Windows computer, Recycle Bin, digital camera card, or MP3 player. And it's free!

WinDirStat is a disk usage statistics viewer and cleanup tool for Microsoft Windows.