Webcam Max is a PC Cam effect software. It's Shareware so that means you must purchase it. You can add all sorts of cool effects to your broadcast! Download the demo at at www.WebcamMax.com

ManyCam is a Freeware webcam effect software for the PC add neat effects to your broadcast, like color effects, masks and much more! Download it free at http://manycam.com/

is a free webcam program for Macs. It is a great alternative for Mac broadcasters to SuperWebcam and WebcamMax, and has all the same features. Only for MACS
(P.s. it's the webcam software I use on my stream! :p  )
Download at http://allocinit.com/index.php?title=CamTwist