Domination is a game that is a bit like the board game Risk
Battle for Wesnoth is a turn based fantasy strategic game
A graphical frontend for PbeM like Eressea
SJCE - free portable cross-platform graphical chess game, 100% Java.
OpenQuest is a computer game conversion of the board game HeroQuest.
Java Chess Engine
MultiLingual Interactive Fiction
War of Respect is an online turn-based MMORPG in 2D-anime style.