Foundry Virtual Tabletop - A self-hosted, modern, and developer-friendly roleplaying platform.
Roll20 - Roll20 is a suite of easy-to-use digital tools that expand pen-and-paper gameplay.
Astral Tabletop - Create, host, and manage your tabletop role-playing games — online or in person
Fantasy Grounds - Fantasy Grounds is a virtual tabletop to help facilitate play of tabletop-style role-playing games...
EpicTable - Virtual tabletop software. Any RPG you want to play. Online, quick and easy.
Inkarnate - A free-form map editor for role-playing games, focusing on overland and continental maps.