http://joycevalenzaworkshop.wikispaces.com/
An overwhelming list of tools for learning. This is a wiki so it is constantly being updated.
http://teachingeverystudent.blogspot.com/2007/06/free-technology-toolkit-for-udl-in-all.html
EdTech Solutions - Teaching Every Student: Free Technology Toolkit for UDL in All Classrooms - Spread the Word!
http://mrssmoke.onsugar.com/Top-20-Websites-Teacher-Should-Start-2010-2011-Year-Without-9213932
Teachers don't miss this post!
http://drop.io/
Use drop.io to privately share your files and collaborate in real time by web, email, phone, mobile, and more. Create each drop in two clicks and share what you want, how you want, with whom you want.
http://www.box.net
Box.net - Free Online File Storage, Internet File Sharing, Online Storage, Access Documents & Files Anywhere, Backup Data, Send Files
http://www.gmail.com
The basics, lots of storage, gives access to all the google tools and there are a lot@