Documentation: Use these effect tools to create normal maps from sprite features such as transparency or color differences
Made 2D sprites looks like 3D using the new Unity 2D lights and Normal Map support - step by step video tutorial and guide about the 2D lighting system in comments.
Download SpriteIlluminator for Mac
Using Normal and Height Maps to Light 2D art - Art Squirrel
2d game scene with dynamic light effects - spriteilluminator
Sprite DLight - Instant normal maps for 2D graphics - Unity Forum
Viktor Lidholt – Adding 2D Lighting to Your Game
SpriteIlluminator: Normal map painting
Using Normal and Height Maps to Light 2D art - Art Squirrel
How can I generate my normal maps ?
cocos2d-x dynamic light tutorial
How can I generate my normal maps ?
Normal map lighting for 2D Pixel Art sprites - The Defoldmine - Defold game engine forum
SpriteIlluminator - Normalmap Editor for 2d Dynamic Lighting &
GitHub - Gamua/Starling-Extension-Dynamic-Lighting: Use normal maps for realistic light effects in the Starling Framework.