Progress WS_FTP - Progress WS_FTP is a robust FTP server solution that enables you to keep an eye on transfer details and security, accelerate file transfers, and protect your data with advanced settings and controls.
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.
SolarWinds Serv-U - SolarWinds Serv-U is a web-based, secure file transfer solution.
Transmit - Transmit is an FTP client for Mac OS X and Mac OS Classic (which is unsupported).
CompleteFTP by EnterpriseDT - CompleteFTP is a secure FTPS and SFTP server for Windows.
Cyberduck - A libre FTP, SFTP, WebDAV, S3, Backblaze B2, Azure & OpenStack Swift browser.