SOGo - SOGo is groupware server with a focus on scalability and open standards.
qBittorrent - Lightweight and open source torrent client that runs on all major platforms.
Baïkal - Cal and CardDAV server
Deluge - Deluge is a full-featured BitTorrent client for Linux, Unix and Windows.
Xandikos - Lightweight CalDAV/CardDAV server on top of Git.
µTorrent - Looking for a torrent site to download movies, music and more? Choose from top torrent sites like The Pirate Bay, RARBG, 1337X, and dozens more. (October 2019)