Are you familiar with the Tracker Component Library[1]? Similar concept, although I like the fact that you show examples in the README.
[1] https://github.com/USNavalResearchLaboratory/TrackerComponen...
[1] https://github.com/USNavalResearchLaboratory/TrackerComponen...
As mentioned earlier with Stone Soup, there is an interesting point. Most tracking libraries were developed by labs connected with the military and were primarily in MATLAB, due to the long history of the topic. Now, with the growth of autonomous vehicles and robotics, interest in this topic is returning.