Adobe Color CC - Generates color themes that can inspire any project.
Unity - The multiplatform game creation tools for everyone.
Colllor - With Colllor it is much easier to generate a consistent color palette with just a few clicks.
Godot Engine - Feature-packed 2D and 3D open source game engine.
iWantHue - Colors for data scientists. Generate and refine palettes of optimally distinct colors.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.