Kdenlive - Free and open-source, full-featured video editor.
Unity - The multiplatform game creation tools for everyone.
Olive Video Editor - Olive is a free non-linear video editor for Windows, macOS, and Linux.
Godot Engine - Feature-packed 2D and 3D open source game engine.
DaVinci Resolve - Revolutionary new tools for editing, color correction and professional audio post production, all in a single application!
Blender - Blender is the open source, cross platform suite of tools for 3D creation.