Related: down, file, HTTP, SFTP, SSH, sync, TCP, transport

WinSCP.net >>WinSCP is an open source free SFTP client and FTP client for Windows.  Legacy SCP protocol is also supported. Its main function is safe copying of files between a local and a remote computer.

FireFTP.MozDev.org >>FireFTP is a free, secure, cross-platform FTP client for Mozilla Firefox which provides easy and intuitive access to FTP servers.

FileZilla-Project.org >>Welcome to the homepage of FileZilla, the free FTP solution. Both a client and a server are available. FileZilla is open source software distributed free of charge under the terms of the GNU General Public License

wget

BetaFTPD.sf.net >>BetaFTPD is a single-threaded FTP daemon, making it very fast (contrary to common belief) while still remaining small (about 20 kB compiled) and providing a decent amount of functionality.

CurlFtpFS.sf.net >>CurlFtpFS is a filesystem for accessing FTP hosts based on FUSE and libcurl.

LftpFS.sf.net >>LftpFS is a read-only network filesystem with caching for smart mirror of sites. Useful for mirroring of Linux repositories. It's based on FUSE and LFTP client, which supports FTP, HTTP, FISH, SFTP, HTTPS, FTPS protocols and works over proxies. LftpFS is a fork from unmaintained FuseFTP.