Mapus is a tool to explore and annotate collaboratively on a map. You can draw, add markers, lines, areas, find places to go, observe other users, and much more.

Since real-time multiplayer can get expensive (even though Firebase has a pretty generous free plan), you'll need to self-host Mapus to use it.

• 🙌 Real-time collaboration to help plan trips synchronously
• ✏️ Draw to highlight areas on the map
• 📏 Create lines to designate paths and measure distance
• 📐 Create areas to mark different zones
• 📍 Create markers to save places on the map
• ☕️ Find places and things to do nearby
• 🔍 Search and navigate to specific places
• 👀 Observe other users by clicking on their avatar
• 📝 View a list of all the annotations, and toggle their visibility
• 💾 Export the map data as GeoJSON
• ...and much more - all for free!

It's basically Google's MyMaps, except it has real-time collaboration.