Avid Xpress DV for Mac

From Avid Technology:

Real-time architecture that delivers more than 100 customizable real-time effects, professional-level color correction with waveform and vectorscope analysis, and multiple simultaneous real-time streams - all in software. You can preview a title, apply a dissolve, perform color correction, and animate a picture-in-picture effect simultaneously - all without rendering. And only Avid Xpress DV v3.5 allows you to customize every parameter of every real-time effect and see it all right away. Avid gives you the creative freedom you want and the image quality you need to deliver professional-grade video on a desktop, laptop, or mountaintop - anywhere your imagination takes you.