FTP Today - FTP Today offers private and secure file transfer/sharing via a hosted Software-as-a-Service model.
CompleteFTP by EnterpriseDT - CompleteFTP is a secure FTPS and SFTP server for Windows.
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.
AWS Transfer for SFTP - AWS Transfer for SFTP (AWS SFTP), is a fully managed service hosted in AWS that enables transfer of files over the Secure Shell (SSH) File Transfer Protocol directly in and out of Amazon S3.