Screenr
What is Screenr?
Screenr is a web-based tool that lets you create screencasts without installing any software. You just click the record button and your screen activity is recorded along with narration from your microphone. Screenr then publishes your screencast in high-definition Flash format. Screenr makes it easy to share your screencast on Twitter, YouTube or anywhere else on the web. Even iPhone users can view your screencast.
Click http://www.screenr.com/ link to open resource.