The "On The Fly Battle Maps" website is located at http://otfbm.io, try this link for a simple example.
You can find information on how to use the site by visiting our documentation site.
To join our community or get hold of Avrae aliases, click this Discord link
If you want to help us improve our product or documentation, join us on discord at the above link.
If you like the tool, please consider helping us with hosting and future development by contributing to our Patreon.