Update README.md

README.md

@@ -2,6 +2,12 @@
 
 The Twinpack Package Manager is a powerful and user-friendly package management tool for TwinCAT libraries. It is designed to empower the TwinCAT community by enabling sharing and distribution of libraries. It acts as a versatile platform similarly to NuGet (but with a PLC touch), allowing users to efficiently manage and deploy their custom-built modules.
 
+Twinpack currently supports the following package sources
+
+1. [Twinpack server](https://zeugwerk.dev/Zeugwerk_Framework/Documentation/snapshot/userguide/twinpack/twinpack_quickstart.html#using-a-package): Zeugwerk hosts open source libraries for and from everyone who is interested for free. Additionally this server type supports special features for Zeugwerk customers like feature branches.
+1. [Nuget Server](https://zeugwerk.dev/Zeugwerk_Framework/Documentation/snapshot/userguide/twinpack/twinpack_nuget_package.html): Everyone can host his own NuGet server and create packages to consume them from the on premises server.
+1. [Beckhoff Library Repository](https://zeugwerk.dev/Zeugwerk_Framework/Documentation/snapshot/userguide/twinpack/twinpack_beckhoffrepository.html): Since TwinCAT 4026, Beckhoff provides a public repository for their libraries.
+
 The full project documentation, including a quickstart guide for **Twinpack**, is available at the following at [Project Documentation](https://zeugwerk.dev/Zeugwerk_Framework/Documentation/snapshot/userguide/twinpack/twinpack_quickstart.html)
 
 Visit the link to get detailed instructions on setting up and using the project.