ManyCam for Mac
ManyCam for Mac Description:
ManyCam free webcam effects software turns your webcam and Mac into a live video studio. Use your webcam with multiple apps simultaneously. Broadcast your desktop or draw over your video window. ManyCam's built in Studio Pro live webcam switcher allows you to easily switch between different video sources instantly and broadcast to Ustream.tv, Youtube, Skype, or anything else!
System Requirements: MacOS X 10.7, MacOS X 10.8, MacOS X 10.9 Intel Mac only
Operating System Support: Mac OS X, Mac Other