iTiVi is a non-linear audio/video editor for GNU/Linux using the GStreamer multimedia framework.

Features
In general

Unlimited video/audio track layers
Full undo/redo history
Frame stepping, keyboard controls and shortcuts
General clip manipulation
Trimming
Snapping
Splitting/cutting
Ripple edits/roll edits
Audio clips manipulation
Sound mixing of multiple concurrent audio layers
Trimming, splitting/cutting
Volume keyframe curves
Audio effects
Audio waveforms
Video clips manipulation
Video effects
Opacity keyframe curves
Video thumbnails
Ability to specify custom aspect ratios and framerates
Ability to create presets for project settings and rendering
Welcome dialog that helps you start a project or load recent projects in two clicks
Ability to preview video, audio and image files directly in the file chooser before importing: this is useful when you don’t remember the name of a file you wanted to import, or when you’re just “looking around” for media to use in your project.
Commandline operation mode, ability to render a project directly from the commandline
Fast, playhead-centered zooming
Mousewheel integration with modifier keys for timeline navigation
Scrubbing
Linking/grouping of clips