Official Website:

Real-time mapping in game or in a web browser as you explore.

JourneyMap is a client mod for Forge which maps your Minecraft world in real-time as you explore. You can view the map in a web browser or in-game as a Minimap or full-screen. It comes in two editionsFairPlay (disables cave-mapping and radar in Multiplayer) and Unlimited (all features available in Multiplayer).

Like it?  Support JourneyMap on Patreon

Server Admins: Check out the new JourneyMap Server Mod for Forge/Bukkit

Need to generate large map images?  Check out the new JourneyMap Tools project