Aegis Online

Aegis Online is the virtual tabletop for all your game night needs. For classic role playing games, traditional wargaming, and more! Aegis Online is extendable, moddable, scriptable, and free. Whether you just want a simple map to keep track of a couple characters, or to impress your friends with an elaborate fantasy town bustling with NPCs, Aegis Online has the tools to bring your friends to the table even when they can't be in the room. Source: Steam Page.