Light2D is 2D lighting system that runs on GPU.
Now free and avaliable on GitHub!
* Normal mapping (not on mobiles).
* It's fully dynamic: lights and obstacles could be moved in runtime.
* Optimized for mobiles.
* No need for physics colliders.
* Light shape could be changed by changing light sprite.
* Point, linear and ambient light types.
* Colored lights and light obstacles.
* Particle system support.
* Supports Unity 5.
See detaled description at Unity forums.
Requires Unity Pro (for Unity below 5.0)