Notify

Modular, DI-native multi-channel notification library for ASP.NET Core. Email, SMS, Push, WhatsApp, Slack, Discord, Teams and more — one interface, bring your own keys, own your data. Maintained by RecurPixel on GitHub, where it has earned 39 stars from the community.

It's actively developed around aspnet-core, csharp, dotnet, and is a solid reference for anyone building with these tools.