Virtual Frog Dissection Kit - Lawrence Berkely National Laboratory
Net Frog - from University of Virginia
Biointeractive - virtual labs from Howard Hughes Medical Center. check tabs for other links, particularly animation ones.
Interesting Interactive Activities- Crash scenes, Simple machines, hip and knee surgery from EdHeads.Org
Virtual Lab- from the University of Virginia " What a fascinating site, especially the DNA"
Wasted - a game about ecology from the Sciecne Museum of London

Recycle City- from our own EPA!!
Anatomy Arcade - some parts are sophisticated, but even I managed to do rather well. Fun for review.

Video Sources

10 Amazing Biology videos from Wired - Editors' favorites