Zig game engine & graphics toolkit
High performance UI layout library in C
Game engine supporting many 3D/2D formats and graphic effects
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Orx: Portable Game Engine
Europa Universalis 4 save game editor
Free, open source game engine online
Delphi Java - VRCalc++ OOSL (Script) and + (Binary Exec Distro)
World Class Leader Board Editor.
VR Adrix Java Works - Paged Lists - Action-Entity Model ...
Retro style, multi-platform soccer game
A 2d shoot 'em up game cr. w. JavaFX. Three enemy types, one end boss.
Mech Station Beta - Tower Defense like Game
PyCAPGE - Python Classic Adventure Point and Click Game Engine
Vivid3D is an open-source 3D engine with powerful 2D UI.
A performance profiler for Minecraft clients, servers, and proxies
Engo is an open-source 2D game engine written in Go
Java Settlers
A Game Similar to Mastermind
Modern 3D engine and IDE written using C# and C++.
Data-oriented and data-driven game engine written in Rust
A cross-platform 2D game engine