We are using the following libraries in Catalyst:

Autofac is used for dependency injection and our modular structure. https://autofaccn.readthedocs.io/en/latest/

SharpRepository is used for the generic repository pattern. https://github.com/SharpRepository/SharpRepository

Dotnetty is a high speed event-driven asynchronous network application framework used for TCP and UDP packet transmission. https://github.com/Azure/DotNetty