Dungeon Sketch is described as 'lo-fi tactical combat map for tabletop roleplaying games such as Dungeons and Dragons. This is meant to replace the whiteboard or graph paper that sits in the middle of a gaming table'. There are more than 25 alternatives to Dungeon Sketch for a variety of platforms, including Online / Web-based, Windows, Mac, Android and iPhone. The best alternative is Roll20, which is free. Other great apps like Dungeon Sketch are Campaign Cartographer (Paid), Eigengrau's Generator (Free, Open Source), Dungeon Map Doodler (Free) and Astral Tabletop (Freemium).
Roll20 is the free, easy way to play tabletop games (such as pen and paper RPGs) online with others. It's completely web-based, so it runs right in your browser. It supports video and voice chat, background music, character sheets, a massive art library, and more!
Campaign Cartographer is the leading map making software for games (RPGs, miniatures and wargaming). Campaign Cartographer gives you fingertip control of both the big picture and the small details. Want a large scale map of your adventuring world? A detailed dungeon floorplan?
Eigengrau's Essential Establishment Generator is a tabletop procedural generation tool for towns, NPCs and much more. It creates paragraphs of text suitable to be read directly to players during a game.
Dungeon Map Doodler is a free, online tool for creating dungeon maps for tabletop role-playing games. Create a dungeon from scratch or use the "Generate Dungeon" option to roll up a random one and then edit it to your needs with a full suite of editing tools.
donjon.bin.sh is a freely accessible, online collection of random generators and other tools for pen-and-paper role-playing games. The collection provides a comprehensive range of advanced generators for creating names, demographics, maps, adventures and even entire worlds.
For the last 20 years, I’ve been playing tabletop RPGs with friends on a very regular basis. I’ve spent a huge amount of time writing scenarii and missions. I did it with traditional pen & papers at first, and with Google Docs afterwards.
Beyond Tabletop is a set of tools for RPG players with easy-to-use online character sheets and maps. Subscription-free and designed to be used on all devices online. Currently offering a battle map and character sheets for Pathfinder and D&D 5e.