Kdenlive is an intuitive and powerful multi-track video editor, including most recent video technologies. Our software is completely free, in all sences of the expression, as defined by the GNU foundation. Using Kdenlive is investing in a community driven project, which aims to establish relationships between people in order to built the best video tools.
http://www.kdenlive.org/

kdenlive
Some features included in version 0.7 include: interface based on KDE’s Oxygen style, capture from FireWire cameras, webcams and Video4Linux devices, grab video from your screen (screen capture), support for jog shuttle devices, independent rendering processes, interactive timeline operations, high definition editing, lossless formats and clip organization/location tools.
Kdenlive makes use of a number of frameworks to provide a range of audio and video effects and transitions, including MLT, Frei0r effects, SoX and LADSPA.
Audio effects include normalization, phase and pitch shifting, limiting, volume adjustment, reverb and equalization filters amongst others.
Video effects include options for masking, blue-screen, distortions, rotations, colour tools, blurring, obscuring and others.
Kdenlive also provides a script called the Kdenlive Builder Wizard or KBW that compiles the latest developer version of the software and its main dependencies from source, to allow users to try and test new features and report problems on the bug tracker.