Kdenlive, as its name stands, is a KDE Non-Linear Video Editor. It is a free software (GPL licensed) primarily aimed at Linux platform but it works on mainy systems (*BSD, Windows, MacOS...) as relying on portable components (QT and MLT framework).

Non-linear video editing is way more powerful than beginners (linear) editors, hence it requires a bit more organization before starting. However it is not reserved to specialists and can be used for small personal projects.

Through MLT framework, Kdenlive integrates many plugins effects for video and sound processing or creation. Furthermore Kdenlive brings a powerful titling tool, a DVD authoring (menus) solution, and can then be used as a complete studio for video creation.

Video editing features

Multitrack edition with a timeline and virtually unlimited number of video and audio tracks, plus facilities for splitting audio and video from a clip in multiple tracks
Non-blocking rendering. You can keep working on a project at the same time a project is being transformed into a video file
Effects and transitions can be used with ease, and you can even create some wipe transitions of your own!
Simple tools for easy creation of color clips, text clips and image clips
Automatic slideshows creation from pictures directories, with crossfade transitions among the images
Configurable keyboard shortcuts and interface layouts
and much more!