Pixar University's Randy Nelson on Learning and Working in the Collaborative Age- Video

VoiceThread- Collaborative, multimedia slide show that holds images, documents, and videos.  It also allows people to navigate pages and leave comments by voice, text, audio file, or video

Edistorm- Organize your ideas in a real time interactive wall.

Entri - Free collaborative tool for writing and sharing documents.

TypeWith.me: Live Text Document Collaboration

Twiddla- Web-based white board

Teach Collaborative Revision with Google Docs-Google Docs has partnered with Weekly Reader’s Writing for Teens magazine

WallWisher
5 Fantastic Things You Can Do With Wallwisher

21 Skype Resources

Sketch Up-Google SketchUp is software that you can use to create 3D models of anything you like.

Scribblar-Multi-user whiteboard, live audio,image collaboration and text-chat

Stixy

Twiddla-Mark up websites, graphics, and photos, or start brainstorming on a blank canvas.

TitanPad-TitanPad lets people work on one document simultaneously

aMAP- create an 'argument map' to foster debate.

Join.Me - Free screen sharing tool

TodaysMeet- Embrace the backchannel and connect with your audience

Prezi - Create online presentations

Mind42