qBittorrent - Lightweight and open source torrent client that runs on all major platforms.
Roundcube - Web-based IMAP email client
Deluge - Deluge is a full-featured BitTorrent client for Linux, Unix and Windows.
HEY - Email at its best, new from Basecamp.
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)
Mailo - Mailo is an email client where you can send and receive emails to and from anyone with an email address.