FileZilla - FileZilla is an FTP, or file transfer protocol, client. It lets individuals transfer single files or batches to a web server. For many years, FTP was the standard for website design. Read more about FileZilla.
Missive - Team communication app now supporting FB, Twitter & SMS
WinSCP - WinSCP is an open source free SFTP client and FTP client for Windows.
Mailtrim - Email lives forever!. Reinvigorate your emailing experience with the best free email client, the Mailtrim
Forklift - The most advanced dual pane file manager and file transfer client for macOS.
Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.