Celluloid:
The World’s First Avisynth-based NLE
 
Introducing Celluloid: The World’s First Avisynth-based NLE
Celluloid is the first and only free, open-source, and fully-featured non-linear editor for Mac OS X. Based on the powerful Avisynth scripting language, Celluloid offers a robust and featureful editing environment. And licensed under the GNU GPL, it is free to distribute, modify, and fork.
 
Features:
    - Real-time preview vs. full render
    - Automatic formatting of input formats to suit the project
    - Hundreds of plugin filters
    - NLE mode and graphical, single-script editor
    - Syntax-highlighted, code-completing script editor
    - Input and output for a wide range of formats using the powerful GStreamer backend
    - .avs project file format
    - Native editing in various colorspaces including YV12, YUV, and RGB

Celluloid is built on the Cocoa programming API and using the Objective-C 2.0 programming language. It is designed to be tightly integrated into Mac OS X.
 
The Celluloid project is currently seeking developers experienced with Cocoa development and the Avisynth scripting language. Apply here.