@devpaps her are some I'm using on Graphene: Joplin (Note taking), AntennaPod (Podcast client), Aegis (TOTP Authenticator), Keepass2android (Password vault), Syncthing-fork (Peer to peer file sync), DAVx5 (DAV client for files, calendar, etc), FairEmail (Email), Etar (Calendar), IronFox (Web Browser)