SCP

Core FTP Mini SFTP Server is a free and secure SFTP server that enables file transfers between computers using SSH/SFTP over the internet or networks.

edtFTPj/PRO is a versatile Java FTP library providing secure FTP connections through FTPS and SFTP protocols. It supports concurrent transfers, asynchronous transfers, SOCKS and HTTP proxy, and advanced FTP scripting features for efficient file transfers.

MobaXterm is a portable software that includes an X server and numerous network tools like SSH, RDP, VNC, and more. It offers a tab-based terminal for accessing different clients.

This software provides a user-friendly file manager interface along with a fast FTP/SFTP/SCP client, various editing tools, CD/DVD burning capabilities, and multi-renaming functionality. It also offers synchronization options and supports multiple hashing algorithms for enhanced security.

MobaSSH is a free and versatile SSH server compatible with popular clients like OpenSSH and Putty. It's easy to install with useful GNU utilities for remote computer management.