We started building a world together on twitch! Starting with a totally random map. I think it's a fun way to build your own campaign world.
Here's the twitch stream where we picked a good map to start with: https://www.twitch.tv/mattcolville/v/67873364
Here's the stream where we populated the curated map with content: https://www.twitch.tv/mattcolville/v/67979566
Hexographer: http://www.hexographer.com/
The .hxm file we created, you can use this to alter the world to your taste:
https://mcdm.gg/YouTube/StreamMap.zip
Notes about the world we created:
https://mcdm.gg/YouTube/StreamWorld.pdf
Tristanexmachina on reddit made a version of the map in Inkarnate!
http://imgur.com/LPuhDA4
https://www.twitch.tv/mattcolville
https://twitter.com/mattcolville
If you want to help support the channel, come by my Amazon page: http://www.amazon.com/Matthew-Colville/e/B004TS39K2/
Better than Patreon because you get a book! :D