Slack - A messaging app for teams who see through the Earth!
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.
Quip Chat Rooms - Real-time chat with your team
Cyberduck - A libre FTP, SFTP, WebDAV, S3, Backblaze B2, Azure & OpenStack Swift browser.
Jive Chime - Real-time messaging for your team
WinSCP - WinSCP is an open source free SFTP client and FTP client for Windows.