CTFs as you need them
Gideros Release version
lua dev plugin for unreal engine 4 or 5
Arianne is an engine to develop multiplayer online games like Stendhal
SDL based generic 2D game engine
A cross platform Lua based game engine
IRB is a game creation toolkit
3D .NET engine for Windows, Linux, Mac
.NET - VISUAL BASIC NVIDIA +ATI PHYSX SLIMDX DIRECTX 9 -ENGINE/WRAPPER
Multi-threaded 2D Renderer licensed under the Mozilla Public License
2D Game Engine, based on OpenGL and focused on Isometric Games