TryRuby.org is an intermediate - advanced tool that helps you learn the programming language Ruby. Useful for developing mobile tools and other web 2.0 products!
Another lightweight jQuery photo slider, this one features a sliding transition and will snap back to the first image in the queue once the viewer reaches the end of the slideshow.
Dyscover is a software system designed to help children with learning disabilities. It can be used to teach characters, numerals, pronunciation, word-association and many more useful and creative things.