UChromaKey is a real-time GPU chroma key solution for Unity.

Demos:
Windows
Mac OS
Android APK
Webplayer

Flexible color keying algorythm allows very precise setup while integrated camera support takes care of video sources. Supports any texture as a source, including RenderTexture and MovieTexture.

Features:
- Fullscreen effect
- Ability to apply ChromaKey to materials (unlit and lit versions of ChromaKey shaders included)
- Ability to apply ChromaKey to alpha-channel of any texture at runtime
- Camera sources handling
- Tested on iOS and Android
- Tested with Vuforia

Manual

Unity forums support thread

Also, you can send your questions, suggestions and bugreports to support email in publisher profile.

Latest version (1.4) requires Unity 5.6 or newer. Previous versions (1.3 &1.2c) is available for older versions of Unity.