A notable mention is https://ubports.com/en/ which is different from postmarketos in a sense that ubports uses old kernels with heavy patches. That means: good support for things, but difficult future.
PostmarketOS uses the newest kernels and tries to integrate their patches into mainline kernel, so that the reliability is maintained with all kernel developers.
give me ANYTHING that’s open-source and not tied to google or apple. i don’t care if it’s shit. i’m old. i just need a phone and maybe some pics and browsing.