PiTiVi

PiTiVi is a free software non-linear video editor  developed by Collabora and contributors from the worldwide community. It is licensed under the terms of the GNU Lesser General Public License. PiTiVi is designed to be an intuitive video editor that integrates well in the GNOME desktop environment. It aims to be "a powerful, flexible video editor that can appeal to prosumers and professionals."

Links
http://www.pitivi.org/