CamDesk is a free, open source, desktop webcam widget, that was created as home surveillance application. Although others have used it for demonstrations even with CamStudio, and QuickTime Player for screen casting.
Flipbook is made to flip a sequence of images and allow you to study the resulting animation frame by frame. That's it, pure and simple. I will use Flipbook as the glue between my digital stills camera and a final animation. It will import JPEGs or PNGs