Smilodon
Smilodon is an open-source ActivityPub implementation built in C with .NET 7, designed to be compatible with the Mastodon Fediverse platform. The project provides developers with the tools and infrastructure needed to build and run their own federated social networking servers that can communicate with other instances across the Fediverse. Smilodon includes a web application API, uses Entity Framework Core for database management with PostgreSQL support, and supports local development with hot reload via the dotnet run watch command. The project offers full database migration capabilities, making it straightforward to manage schema changes during development. Smilodon aims to serve as a learning resource and starting point for developers interested in understanding and contributing to ActivityPub-based social networking. Primary contributors currently include Brendan Enrick, with the project welcoming additional contributors. Documentation is available through the project's GitHub Pages site.