Debian 11
Debian 11 "Bullseye" was first released on August 14th, 2021 and is currently Debians "oldstable" release.
Offsprings of Debian 11 "Bullseye" include Pure OS "Byzantium" (not indexed on repology.org and thus not listed), and Devuan 4.0 "Chimaera".
You can try to include some packages from newer branches of Debian such as Debian Unstable/sid or even Debian experimental, as explained on the Mobian Wiki.
Calculator
Perform arithmetic, scientific or financial calculations
Chats
Messaging application for mobile and desktop
Dictionary
Check word definitions and spellings in an online dictionary
Déjà Dup Backups
Protect yourself from data loss
FeedReader
RSS client for various webservices
Firmware
Install firmware on devices
KBibTeX
BibTeX editor by KDE to edit bibliographies used with LaTeX
KTuberling
A simple constructor game suitable for children and adults alike
Kirigami Gallery
Shows examples of Kirigami components and allows you to play with them
Metronome
A simple Metronome application for the GNOME desktop
OTPClient
Application for managing TOTP/HOTP tokens with built-in encryption
OnionShare
Securely and anonymously share files, host websites, and chat with friends
Parental Controls
Set parental controls and monitor usage by users
Passwords and Keys
Manage your passwords and encryption keys
Roger Router
Journal, Fax-Software and Call-Monitor for AVM FRITZ!Box or compatible
Simon Tatham's Portable Puzzle Collection
A collection of small computer programs which implement one-player puzzle games.
Syncthing GTK
GUI and notification area icon for Syncthing
gPodder-adaptive
Media aggregator and podcast client for mobile and desktop alike