Substance Designer - Substance Designer is a node-based non-destructive application for material authoring.
Unity - The multiplatform game creation tools for everyone.
Material Maker - Cross-platform, procedural texture generation tool.
Godot Engine - Feature-packed 2D and 3D open source game engine.
PixPlant - A complete solution for repeating textures and 3D maps. Save a lot of texturing time with PixPlant!
Blender - Blender is the open source, cross platform suite of tools for 3D creation.