ConceptKicker - Crowdfunded 3D printed art
Unity - The multiplatform game creation tools for everyone.
Nicely Noted - Subscription service for beautiful greeting cards and stamps
Godot Engine - Feature-packed 2D and 3D open source game engine.
Mapiful - Create & order custom printed maps of your favorite places
Blender - Blender is the open source, cross platform suite of tools for 3D creation.