FREE screen grabber now with screencasting.
BSEditor: GrabberRaster allows you to take repeated screen grabs/captures from almost anything that appears on your Macintosh screen. Grab, resize, and save -- all in One Click. Use arrow keys for fine control over grab region. Save to JPEG, TIFF or PNG.
With the addition of a PAID license GrabberRaster Screencast Edition allows you to grab portion of your Mac screen and loop it back as a Virtual Camera input.