Domination is a game that is a bit like the board game Risk
Turkish Traditional Backgammon Game
PyMancala: A Python API for the Mancala game
Java Settlers
Battle for Wesnoth is a turn based fantasy strategic game
Android App for Axis&Allies board game battle simulations
Olympia PBEM code
Original turn-based strategy wargame & boardgame
Star Trek Web browser game
Source for a massively multiplayer online turn-based game
MultiLingual Interactive Fiction
Unique web based space strategy game written by Andras Nemeth
A TBS game written in C++ but the twist is its only console based.
Tactical, turn-based game engine, that uses OpenGL and WinAPI
A turn-based space strategy game for Android