Picasa Web Album - This is a great place to store and share pictures. You can then show slideshows directly from your web albums, and you can invite collaborators to contribute pictures too.
VoiceThread - VoiceThread, a great tool to collaborate away from the classroom, and learn from the cloud.
Pixton - Express yourself and channel your artistic spirit by creating comics!
Blogger - Post your ideas and projects for the whole world to enjoy!
Prezi - Create and tell stories in the cloud, on your own digital canvas. Here are directions on how to set up an account.
Slide Rocket - Online presentation platform that lets users create, manage, share and measure presentations!