(And, ideally, the ability to play them on the computer.)
Games: https://tiplanet.org/forum/archives_list.php?cat=Jeux+z80
A lot of emulators there: https://tiplanet.org/forum/archives_list.php?cat=Utilitaires...
One of them is web-based: https://tiplanet.org/forum/archives_voir.php?id=1414 (also hosted online at brandonmeyer.net/projects/TI8XEmu/TI8XEmu.html but I can't access it now)
Coming second as communities are Omnimaga, and ti-calc.org
I feel like the only redeeming quality of these calculators is the community around them; and they make kids interested into programming and electronics. The landscape is looking better and better for who wants to hack his calculator.
Of course, the most convenient emulator is offered by numworks for their calculator: it's right there, on their website: https://www.numworks.com/simulator/