Doodle : Doodle radically simplifies the process of scheduling events, whether they’re board or team meetings, dinners with friends, reunions, weekend trips, o...
Feed43 : Your favorite site doesn't provide news feeds?
This free online service converts any web page to an RSS feed on the fly.
RegExr : RegExr is an online tool to learn, build, & test Regular Expressions (RegEx / RegExp).
Etherpad is an Open Source online editor providing collaborative editing in really real-time powered by Node.js