Natron

For visual effects compositing, commercial software like Nuke is pricey and closed. Natron is the open alternative: open-source node-based visual effects compositing software, build compositing graphs with connected nodes, support keying, tracking, color and OpenFX plugins, and handle professional VFX tasks, a free open-source alternative to Nuke. Cross-platform, open source.

Features

Node compositing: Node-based VFX compositing.

Pro tools: Keying, tracking, color and more.

Plugin support: Support OpenFX plugins.

Open and free: Cross-platform, open source, free.