GrabCam 1.0 for Mac is available as a free download on our application library. GrabCam for Mac is categorized as Audio & Video Tools.
From the developer:
GrabCam takes live video from Apple's iSight (or another third party DV camera) and generates superfluous effects in OpenGL. Its pretty fun to play around with.
You may want to check out more software for Mac, such as Massive Audio Compressor, which might be similar to GrabCam.