Keyword: Collaboration

Would you like to add a chat on your website or to show things on a website to your friends? Then you should take a look at TogetherJS, a Javascript library by Mozilla Labs (what they do is awesome) that is easy to integrate.

Browsing news article, I got to discover an open source collaboration platform called PEPS. It challenges Google Apps and Dropbox solutions by offering a team's members the ability to communicate and to share files between each other. And it's only the beginning !