PixelShox Studio for Mac

From Pol-Online:

PixelShox Studio's revolutionary new approach in 2D/3D animation creation helps both novice and professional users in designing complex and interactive video effects through an intuitive Aqua interface.
Such animations are rendered in real-time on the computer's screen thanks to OpenGL and can be used either for personal enjoyment, or professionally in any project where interactive visuals are required: VJing, multimedia installations, presentations, concerts...

Completely hardware accelerated and using fully the latest Mac OS X technologies (OpenGL, CoreAudio, CoreMIDI, Cocoa...), this node-based 2D/3D video animation tool unleashes your creative inspiration with more than a 100 plug-ins (from basic mathematic operators to live video import), virtually unlimited number of compositions and layers, well-designed user-interface and great performances even on low-end machines!

PixelShox Studio is built on top of the PixelShox 3D Engine, a highly-flexible and extensible plug-in based OpenGL engine, designed to take advantage of the latest and upcoming technologies. In case you are missing a functionnality, you can even create your own plug-in(s) with the PixelShox SDK.

This version of PixelShox Studio is a public beta: this means that although it is almost feature complete, it still has bugs that could possibly make it crash. Actually, the fact that PixelShox Studio is an application with limitless creation possibilities means you will likely encounter bugs at some point. Note that the documentation is not final either.
You should be aware of these limitations when using this software: if you are not confident about using a beta version, you should wait for the official final release.
The purpose of a public beta is to allow developers to get feedback regarding their product and have bugs reported so that when the final version is out, it's the best possible. From a user point of view, public betas allow people who want to, to get their hand on prerelease versions of products.