LibreServer Apps

AberMUSH - MUD game played over telnet
Akaunting - A web based accounts system for small businesses or freelancers
Bludit - Databaseless blogging system
Conduit - Lightweight matrix chat server
CryptPad - Collaborative documents, presentations, votes and drawing
DLNA - Play media on UPNP/DLNA supported devices
Dokuwiki - A databaseless wiki system
Element - Element web client for Matrix
Epicyon - ActivityPub social networl instance
EteSync - End-to-end encrypted sync of calendar and contacts between devices
Etherpad - Collaborative document creation
Federated wiki - A new approach to creating wiki content
Flightgear - Multi-player server for the flight simulator
Freeciv - Multi-player server for the city building game
Gemini - Gemini protocol server, similar to gopher but with encryption
Gitea - Lightweight git project hosting system
Grocy - Inventory management for your home
Icecast media stream - Make your own internet radio station
KanBoard - Simple kanban system for managing projects or TODO lists
Lychee - Make your photo albums available on the web
Minetest - Multi-player server for Minetest
MPD - Stream music from your server
Mumble - VoIP and text chat system
Nextcloud - File storage, chat, webmail and video conferencing
Poker - Multi-player server for PokerTH
PrivateBin - Pastebin where the server has zero knowledge of the content
Rsync - The classic file syncronization tool
Streams - Nomadic social network server
XMPP - Chat server