http://prezi.com/
Zooming presenter - alternative to powerpoint and very child friendly

https://www.google.com/accounts/ServiceLogin?service=writely&passive=1209600&continue=http://docs.google.com/&followup=http://docs.google.com/&ltmpl=homepage
Googledocs - online collaboration for documents, spreadsheets, drawing, presentations and forms

http://www.glogster.com/
Collaborative online poster to express learning

http://www.tatemovie.co.uk/
Make movies to express learning

http://voicethread.com/
Collaborative multimedia resource for school, classroom and home