Roll20 - Roll20 is a suite of easy-to-use digital tools that expand pen-and-paper gameplay.
Inkarnate - A free-form map editor for role-playing games, focusing on overland and continental maps.
Astral Tabletop - Create, host, and manage your tabletop role-playing games — online or in person
Campaign Cartographer - Campaign Cartographer is the leading map making software for games (RPGs, miniatures and wargaming).
Fantasy Grounds - Fantasy Grounds is a virtual tabletop to help facilitate play of tabletop-style role-playing games...
Wonderdraft - is an intuitive yet powerful fantasy map creation tool for 64-bit Windows 10, Linux, and MacOSX.