PyCAPGE - Python Classic Adventure Point and Click Game Engine
3D modeler, 3D game maker, 3D demo maker
Opensource Created Custom Viewers For Virtual Worlds like SecondLife.
Free GUI Minesweeper Game for Windows
Realism Invictus mod for Civilization IV
For exploring cellular automata like Conway's Game of Life.
3D slider puzzles for kids; helps teach solid geometry
Geraniums Pot - Intersecting Circles Puzzles Simulator
Air traffic control tower and radar simulator (solo + multi-player)
GemRB is a portable open-source implementation of the Infinity Engine
A real-time 3D Engine written in Ada
A simple and fast game launcher for Windows 7,8,10,11 made in Godot.
Cooperative multiplayer graphical RPG and adventure game
An in-progress 2D tactical RPG
GM tool for the RPG game "Legend of the Five Rings" 4th edition
Royal Entertainment Graphics eXecution (REX)
Yet another Pathfinder Character Generator
Chess Stats is a slightly different way to analyze your chess games.
Gem Dash aka Boulder or Dyna Blaster like 8-bit style game in Python
Vivid3D is a C++ IDE/3D engine, with python scripting.
Arianne is an engine to develop multiplayer online games like Stendhal