Here are some of the other projects I've worked on in the past — some still actively maintained, and others retired or on pause.
AltWalker is an open source Model-Based Testing framework that supports running tests written in python3 and .NET/C#. You design your tests as a directed graph and AltWalker generates test cases from your graph (using GraphWalker) and executes them.
An open source web based editor for AltWalker and GraphWalker models. The web applications allows you to visually build and edit your models.
Visit the app at: https://altwalker.github.io/model-editor.