Vierstein (FourStone) is a RPG creation and playing kit based upon games like Unlimited Adventures. It uses a custom, and hopefully inventive, rule-set that focuses on single player environment. Built upon Python and Pyui.
SwingKore. Under development. Visual Plugin for OpenKore, writtin in Java 5. It will clone Ragnarok Client windows. Simmilar to VisualKore and Revemu, but OpenSource. It works by Client & Server system. Home: http://www.levelbot.org/