Zoho Show - Online Presentation tool
Stixy: For Flexible Online Creation Collaboration and Sharing
cl1p.net - The internet clipboard
15 Free Tools for Web-based Collaboration
15 Free Tools for Web-based Collaboration
Simple Team Performance Management - iDoneThis
WorkFlowy - Organize your brain.
Droplr
StackShare - Discover and discuss the best dev tools and cloud infrastructure services
102 Free (or Free-to-Try) Online Collaborative Learning Tools
Spundge — Create, Deliver and Monetize Your Content
Wiggio.com - Makes it easy to work in groups
Live Documents - Office for the Internet Generation.
Abstract - Secure version control and design workflow management