Unity - The multiplatform game creation tools for everyone.
BlueMaxima's Flashpoint - the webgame preservation project.
Godot Engine - Feature-packed 2D and 3D open source game engine.
SWF File Player - SWF File Player is a free player for SWF (Shockwave Flash) files.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
CheerpX for Flash - its adobe flash player in webassembly