Teaching with Technology is a great resource for teachers. It has a list of different technology resources for educators. The resources are grouped in tables by category. Categories include Tools for: Creating, editing, and sharing; Communicating and networking; Managing time, tasks, and information, and Making it all work.
Many of the resources I've covered here in this blog, but there are a lot of other great resources listed. Everything from documents to presentations to videos to Skype to Twitter to Google Calendar to Remember the Milk to firewalls and anti-virus.
This is definitely a site to check out and bookmark.