Pick any game engine, and you are maybe a third of the way to having the tools you need to ship a game. But there are also elements that live outside the engine: the asset pipelines your artists depend on, the level editors your designers build in, the audio tools your sound team cleans up with, to name a few. Open source has tools for those workflows and more.
Most of these open source projects exist because someone decided their team’s biggest pain point was worth fixing for everyone. The 10 below can help game developers with their common pain points, and every one of them can plug into your pipeline whether you ship on Godot, Unity, Unreal, MonoGame, or your own custom engine.
1 Blockbench: Low poly 3D modeling
Blockbench is a 3D model editor purpose built for low poly models with pixel art textures. It started life as a Minecraft model editor. That lineage shows in the interface, which is built around cubes, planes, and meshes you can animate without setting up a full rigging pipeline. Since then, the project has grown into a general purpose tool with texture painting, UV mapping, paint directly on the model in 3D, a keyframe animation timeline with a graph editor, a plugin store, and exports to glTF, OBJ, and a long list of game specific formats.
