Vidux is a free open source video and music editing software.
Vidux is aimed to become a video and music editing software that has an easy learning curve and many powerful abilitites. Allowing users to perform many tasks with fewer clicks, less key presses, and minimum mouse movement is the main focus. Customization is also a high priority. So you can pick what you want to see, share your layout, and reuse your layout as either a default or for a specific project type.
The idea is to have this program functioning on Windows, Mac, and Linux.
If you want to contribute, feel free to. Just send a pull request and get started!