Unity - The multiplatform game creation tools for everyone.
Solaris Sky Calendar - An astronomy calendar right in your pocket
Godot Engine - Feature-packed 2D and 3D open source game engine.
Lumy - Helps you track photographic times
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Marline - Discover weather, tides and moon, like never before