HexChat
HexChat – free and open source, cross-platform IRC client, forked from XChat
Dino
Dino – free and open source modern XMPP (jabber) chat client with support for end-to-end OMEMO and OpenPGP encryption
Rats on The Boat
Rats on The Boat – free and open source BitTorrent P2P multi-platform search engine for Desktop with integrated torrent client
Tribler
Tribler is an free and open source software project facilitating searching, streaming and sharing content using P2P technology
WebTorrent Desktop
WebTorrent Desktop is a free and open source streaming torrent client for the desktop
Akregator
Akregator – free and open source is a news feed reader, that supports RSS and Atom feed formats with a built-in web browser
Liferea
Liferea – news aggregator that supports RSS and Atom feed formats with a embedded web browser for Linux. Free and open source program
Persepolis Download Manager
Persepolis – a simple cross-platform free and open source download manager with a built-in video downloader
uGet
uGet – cross-platform free and open source light but powerful download manager
Geary
Geary – simple free and open source email client for GNOME with the necessary set of functions for comfortable work with