Hapthorn is a project I'm working on to implement ActivityPub sort of like Mastodon but in ASP.NET Core. It's also a way for me to keep my finger in the ASP.NET Core, Angular, and Docker ecosystems while also writing some Open Source.
Hapthorn isn't ready to use yet.
About the Name
The name Hapthorn comes from a character in the Matthew Hughes Archonate universe. You should read his books, Matt's my favourite author.