Unity - The multiplatform game creation tools for everyone.
EarTrumpet - Volume Control for Windows
Godot Engine - Feature-packed 2D and 3D open source game engine.
Volume2 - Volume2 is an advanced Windows audio mixer, a complete replacement for the standard Volume Control.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Sound Control - App-specific volume control