AppointMe – open-source .NET SaaS template (modular monolith, DDD)

AppointMe is an open-source .NET SaaS template built as a modular monolith using Domain-Driven Design, providing a production-ready starting point for developers creating multi-tenant scheduling and appointment applications. It targets .NET developers who want to skip boilerplate and adopt clean architecture patterns, including modularity, event-driven communication, and testability. The project is interesting because it demonstrates how to implement a complex, real-world SaaS system with modern .NET practices in a maintainable, single-deployment-unit structure.