Documentation: Use these effect tools to create normal maps from sprite features such as transparency or color differences
Normal map lighting for 2D Pixel Art sprites - The Defoldmine - Defold game engine forum
Viktor Lidholt – Adding 2D Lighting to Your Game
Tiled2Unity – Using normal maps for your tiled projects
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.
SKLightNode, normal maps, and light scaling — Dodo Games
SpriteIlluminator: Normal map painting for 2d games
Affinity Photo make normal maps - Older Feedback & Suggestion Posts - Affinity
Sprite Shaders for Unity - Spine Forum
Download SpriteIlluminator for Mac
2D Normal Mapping in Godot with Sprite Illuminator : r/godot
Viktor Lidholt – Adding 2D Lighting to Your Game
SpriteIlluminator: Normal map effects
SpriteIlluminator Alternatives and Similar Software