CompleteFTP by EnterpriseDT - CompleteFTP is a secure FTPS and SFTP server for Windows.
FTP Today - FTP Today offers private and secure file transfer/sharing via a hosted Software-as-a-Service model.
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.
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.
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.
SolarWinds Serv-U - SolarWinds Serv-U is a web-based, secure file transfer solution.