OpenShot

OpenShot is an open source video editing suite for Linux (only). OpenShot has a reasonably comprehensive feature set (comparable to, say, Premiere 5). To quote the developer:

I have a simple mission: To create an open-source, non-linear video editor for Linux. Many have tried and fallen before me, but for some reason I feel compelled to try myself. I am documenting my journey in this blog for all to read. It will be a dangerous journey, and I might not make it back alive. Hold on tight, and enjoy the ride! By the way, I’m calling this project OpenShot Video Editor!