jrollans.com is a Fediverse instance that uses the ActivityPub protocol. In other words, users at this host can communicate with people that use software like Mastodon, Pleroma, Friendica, etc. all around the world.
This server runs the snac software and there is no automatic sign-up process.
A full fediverse instance running on a simple shared host, in pure PHP, with no external dependencies. That is the idea behind Starling:
https://github.com/dfaria-eu/Starling/
Just a reminder: the fediverse sticker pack is still available on this page: https://raphaelbastide.com/fediverse-stickers/
Gif by @glvn
CC @FediverseSymbol