Wikipedia
Kdenlive
Kdenlive (KDE Non-Linear Video Editor) is an open-source video editing software based on the MLT Framework and KDE. The project was started by Jason Wood in 2002, and is now maintained by a small team of developers. With the release of Kdenlive 15.04.0 it became part of the official KDE project.
Kdenlive packages are freely available for Linux and FreeBSD, and the source code is available for Mac OS X under the terms of GNU General Public License version 2 or any later version.