instructables

According to the website:

Share what you make and how others can make it.

by using photos and short descriptions.

This is a great place to start if you want to try some DIY projects. The projects listed in the site varies a lot - so anyone should find something interesting to try.

The subtitle of the site is "step-by-step collaboration". Technically, it is not collaboration. It is sharing.

cross posted to Random Walk in Learning

Collaborative tools

Here is a list of selected collaborative tools currently available to anyone free from the webs:

Document writing
Writely
Zoho writer
AjaxWrite
gOffice

Spreadsheet
Numbler [via MasterMind Explorer Issue 162]
Google Spreadsheet
Num Sum
and many more from a google search.

Drawing Tools
Google SketchUp A 3D modeling tool
ajaxSketch and Gliffyare web-based drawing tools that provide an environment for diagramming, creating flow charts.
Mikon vector-based drawing and sharing enabled.

Notes sharing
Google Notebook
NoteClip
NetNotebook.net
Wizlite

Please send me more links to make this more comprehensive.

cross posted to Random Walk in Learning