Media Systems:
- Kodi - Media Centre / Player
- HiFi - Web Interface Music /Radio Player
- SubSonic - Feature rich media streaming server with web interface.
- SqueezeBox - Also known as Logitech Media Server.
- SqueezeLite - Audio player for SqueezeBox.
- Shairport Sync - AirPlay audio player with multiroom sync
- BruteFIR - EQ and Digital Room Correction via ALSA.
- MiniDLNA - Media streaming server (DLNA, UPnP)
- Ampache - Web interface media streaming server.
- Emby - Web interface media streaming server.
- Plex Media Server - Web interface media streaming server.
BitTorrent:
- Transmission - Lightweight BitTorrent server with web interface
- Deluge - Alternative BitTorrent server with web interface
- qBitTorrent - Lightweight and fast (c++) BitTorrent server with web interface
- rTorrent - BitTorrent server with ruTorrent web interface
Cloud / Backups:
- OwnCloud - Your own personal cloud based backup/data storage system
- Pydio - Feature-rich backup and sync server with web interface.
- UrBackup Server - Full backups for systems on your network
- Gogs - GitHub style server, with web interface.
- Syncthing - Backup and sync server with web interface.
DNS Servers:
- Pi-hole - A DNS/Web server that will block ads for any device on your network.