Natron is an open source, cross platform nodal compositing application. It is built around industry standard open source tech such as OpenFX, OpenEXR, OpenColorIO and OpenImageIO. The feature set includes realtime playback/RAM cache, multi-threaded rendering, 2d tracking, rotoscoping, grading, animation via f-curves and 3rd party OpenFX plugin support. All contained within a familiar, intuitive interface with an XML based project file format.
- Free and open-source node based alternative to After Effects. It's pretty similar to Nuke, but doesn't cost anything.
- Its simple (when you get the arrangement) but still very powerful, easily works with Blender and its free!!
- Its hard to understand at first, but once you know what you're doing, every things is worth it