EtherPad : Etherpad is an Open Source online editor providing collaborative editing in really real-time powered by Node.js
Feed43 : Your favorite site doesn't provide news feeds?
This free online service converts any web page to an RSS feed on the fly.
RoundPic : Online tool for making anti-aliased rounded corners (very Web 2.0!) for avatars and images
Vector Magic : Easily Convert Bitmap Images To Clean Vector Art
Automatically convert bitmap images like JPEGs, GIFs and PNGs to the crisp, clean, scalable vector ar...
A better way to conduct remote interviews
WebRTC based video chat + code editor = Awesome interviews