Collaboratif

Get flash to fully experience Pearltrees

Scribd

Simple private real-time sharing and collaboration by drop.io

Prezi - The zooming presentation editor

Mozilla Labs » Raindrop

https://accounts.google.com/ServiceLogin?service=wave&passive=1209600&continue=https://wave.google.com/wave/&followup=https://wave.google.com/wave/&ltmpl=tempopensignups2

Google Wave - Communicate and collaborate in real time

A wave is a live, shared space on the web where people can discuss and work together using richly formatted text, photos, videos, maps, and more.