What are some alternatives?
When comparing PyMapper and MapTool, you can also consider the following products
Campaign Cartographer - Campaign Cartographer is the leading map making software for games (RPGs, miniatures and wargaming).
Roll20 - Roll20 is a suite of easy-to-use digital tools that expand pen-and-paper gameplay.
DUNGEONFOG - Online authoring tool to draw rpg maps & dungeons, create dynamic notes and share your maps online. Create dungeons, world maps and more with the easy to use map editor and create your game master notes dynamically.
Fantasy Grounds - Fantasy Grounds is a virtual tabletop to help facilitate play of tabletop-style role-playing games...
AutoREALM - AutoREALM is a Free GNU mapping software (a "cartographer") that can design maps of...
Beyond Tabletop - Beyond Tabletop is a set of tools for RPG players with easy-to-use online character sheets and maps.