del.icio.us Tidbits: Collaboration + Tool

Here is the first of my weekly sampling from my del.icio.us favorites list.

This time I chose the tags "tool" and "collaboration". Generally, this would mean either information on collaboration tools, or the tools themselves. Here's what I found I have:


backpackit
Project management collaboration tool

Harold Jarche : Strategies for online collaboration » PKM - my best tool
A post on Harold Jarche's blog with a model for how he builds knowledge in his PLE

Mind42 - Free Online Mind Map
Brainstorming

A Step-by-step guide to global collaborations
A post on Kim Cofino's blog "Always Learning"

Facebook Study Groups
Listing, scheduling, discussion, notes and file management

wetpaint
free wiki tool

bubbl.us - free web application for brainstorming online
Mindmapping

del.icio.us
Online resource organizational and sharing tool

pbwiki
free wiki tool


What are your favorite collaboration tools or articles on the subject?