• https://system6.app
• https://system7.app
• https://kanjitalk7.app
• https://macos8.app
• https://macos9.app

besides the above five domains, https://infinitemac.org has multiple point releases of every major release of the Mac System Software from 1.0 onwards.

source code is here: https://github.com/mihaip/infinite-mac

@mihaip@hachyderm.io - in case you see this - thank you so much for building this!