An open-source CRM that I am building in .NET Blazor. You can download the latest version at:
The source code for this project is available at https://wickett.visualstudio.com/CRM. If you wish to modify for this for your own needs please feel free to do so. If you wish to contribute any fixes or enhancements please let me know.
You can use this as a base for your own solution, or you can just grab any code that you want to use from the solution. If you wish to rename the solution you will find a LINQPad script at the root of the solution named "freeCRM - Rename App Files.linq". Open that file in LINQPad and follow the instructions in that file for how to rename the solution to suit your needs.