Roll20 - Roll20 is a suite of easy-to-use digital tools that expand pen-and-paper gameplay.
Campaign Cartographer - Campaign Cartographer is the leading map making software for games (RPGs, miniatures and wargaming).
PlanarAlly - PlanarAlly is a web tool that adds virtual battlemaps with various extras to your D&D toolbox.
Astral Tabletop - Create, host, and manage your tabletop role-playing games — online or in person
Tabletop RPG Map editor 2 - RPG Map II is a “tabletop RPG” oriented map maker, created with the “keep it clean & simple” philosophy in mind.
Fantasy Grounds - Fantasy Grounds is a virtual tabletop to help facilitate play of tabletop-style role-playing games...