This is a repository by the developers for the manga reader app Futon. https://futon.wtf .

Currently it serves 1 apps. To add it to your F-Droid app, scan the QR code (click it to enlarge) or use this link:

https://futon.wtf/fdroid/repo

If you would like to manually verify the fingerprint (SHA-256) of the repository signing key, here it is:
A6 B6 C0 D8 4A E0 97 F1 B2 98 24 DB F7 5C A6 D9 87 A1 49 1A B3 AC 32 7E 43 E8 F2 AC 1E 0B D0 3F