Glogster or Edu Glogster - create an online poster with audio, video, images, and links.
Animoto for Education (get a free upgraded account and then forward access code to your students) - designs a video from your images instantly
Zoho - online collaboration for slideshows, documents, wikis and MUCH more
Jing - free download - screen capture program - video can be saved to your computer or automatically to Screencast
Screencast - storage for documents, images, presentations or videos
Voki - Speaking Avatar creator; no account needed to embed voki into a blog or wiki.
Prezi - Create zooming presentation
Bubbl.us- Create mindmaps collaboratively
Ning - Create a social/educational network site
Diigo - Social/educational bookmarking site with web-highlighter and sticky note features
Delicious - Social/educational bookmarking site