Take the chess graphism, and use it with a chess engine.
Pygrid is an open-source and cross-platform pygame/python 2D engine.
A world editor for HGE game engine written in python and uses OpenGL.
A mobile tower 3D tower defense/defend the flag game
A multiplatform game engine for interactive fiction experiences
A 3D, fully concurrent game engine
A cross-platform game framework based on OpenGL and GObject.
A retro style video game engine for RPGs and adventure games.
2D Game Engine, based on OpenGL and focused on Isometric Games
A graphics engine + toolkit.
3D game engine for C and C++
Sprite Font Creator
A truly extensible cross-platform game engine
A very small multi-platform game engine for creating desktop games.
A lightweight HTML5 Game Engine
Little game background framework in java.
Game development toolkit
UtiliGame is a light-weight game engine written in Java.
An open source skateboard games engine written in C# and .NET.