Generate your own coastline region, complete with its own language for city & territory names! This is a project using terrain and language generation originally written by mewo2, but updated slightly for use here. For more info on the terrain & language generation, check out his write up here: http://mewo2.com/
If you want to run this yourself, cool! The following will get you set up:
git clone --recursive https://github.com/ryelle/constructed-coastlines constructed-coastlines
cd constructed-coastlines
npm install
npm run dev
This doesn't run a local server, so you'll need to handle that yourself. I have http-server installed, so I was able to do this:
hs -a maps.localhost -p 3000
Which gave me http://maps.localhost:3000/.
If you want to save anything generated, you can print to PDF, or open the inspector in your browser and copy the generated HTML/SVG code. There isn't currently a build-in way to save your maps.