Pierre Gallaz's apps: the black-and-white, text-only Reader's family for e-ink and digital detox, retreat bells, and a few small tools. No ads, no tracking, no accounts. https://gallaz.ch/eink

Currently it serves 36 apps. To add it to your F-Droid app, scan the QR code (click it to enlarge) or use this link:

https://funkypitt.github.io/fdroid-repo/repo

If you would like to manually verify the fingerprint (SHA-256) of the repository signing key, here it is:
64 19 1E 58 C9 8A D1 97 1B CA 06 69 B6 BF AB 5C 71 35 D6 41 1A 8E AA 25 27 41 C2 D3 5F 16 10 7C