How about some in-process messaging with no dependencies? Carl and Richard chat with Jimmy Bogard about his work with MediatR, a simple mediator pattern implementation in .NET. Jimmy talks about how MediatR emerged from his work with customer applications having controllers and/or managers that slowly got bigger and more complicated... and how they became difficult to maintain. Using the mediator pattern to break down those blocks of code into more manageable chunks needed a bit of tooling that was cut and pasted from project-to-project until MediatR was born!