What are some alternatives?
When comparing PyMapper and Campaign Cartographer, you can also consider the following products
AutoREALM - AutoREALM is a Free GNU mapping software (a "cartographer") that can design maps of...
Dungeon Painter - Dungeon Painter is a free powerful encounter map design tool.
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.
Inkarnate - A free-form map editor for role-playing games, focusing on overland and continental maps.
Roll20 - Roll20 is a suite of easy-to-use digital tools that expand pen-and-paper gameplay.
Wonderdraft - is an intuitive yet powerful fantasy map creation tool for 64-bit Windows 10, Linux, and MacOSX.