I'll be looking for an open-source option first today, but if not, I can wholeheartedly recommend the xplorer2 from Zakbat. I've been using it for more than 10 years and it's fantastic for me. As far as I know, this is the work of a single guy. It is not cheap, but it has worked extremely well and has been reliable for me for so many years that I can't recommend it enough. It has a free trial to test it.
Advanced Python Mastery (course by @dabeaz). Contribute to dabeaz-course/python-mastery development by creating an account on GitHub.
An exercise-driven course on Advanced Python Programming that was battle-tested several hundred times on the corporate-training circuit for more than a decade. Written by David Beazley, author of the Python Cookbook, 3rd Edition (O'Reilly) and Python Distilled (Addison-Wesley). Released under a Creative Commons license. Free of ads, tracking, pop-ups, newletters, and AI.