GrabberRaster is a new take on an old idea: making screen grabs more efficient. GrabberRaster makes it both easy and convenient to capture almost any picture or graphic that appears on your Mac screen.
With a paid license, screencast anything that appears on your Mac screen as a virtual camera, compatible with most QuickTime/webcam applications.
Combined with CamCamX (also from b-l-a-c-k-o-p.com), you can perform live video mixing of your built-in iSight camera and screencasts, sending the mixed feed directly to Yahoo Messenger, Skype or any other camera-enabled application.