FileZilla is a powerful FTP-client. It has been designed for ease of use and with support for as many features as possible, while still being fast and reliable.Bundleware
Be aware that installing FileZilla on your computer might install some bundleware/malware on your machine. See this thread on the FileZilla forum: https://forum.filezilla-project.org/viewtopic.php?f=2&t=48441
WinSCP, a popular free SFTP and FTP client for Windows, copies files between a local and remote computer. It supports also FTPS, SCP and WebDAV. It offers easy to use GUI for all common file operations and a powerfull automation with .NET assembly.
A libre FTP, SFTP, WebDAV, S3, Backblaze B2, Azure & OpenStack Swift browser.
CarotDAV is a Simple WebDAV / FTP / SkyDrive / DropBox / GoogleDrive / Box / SugarSync client for Windows OS, available free of charge. It is also able to read GoogleDocs or IMAP.
SSHFS allows you to mount a remote filesystem using SFTP. Most SSH servers support and enable this SFTP access by default, so SSHFS is very simple to use - there's nothing to do on the server-side.
gFTP is a simple GTK+ based ftp client for Linux. Supports the FTP, FTPS (control connection only), HTTP, HTTPS, SSH and FSP protocols, FTP and HTTP proxy server support, supports FXP file transfers (transferring files between 2 remote servers via FTP), UNIX, EPLF, Novell...
FTP Rush is a powerful FTP/FXP/SFTP/TFTP client sofware for Windows 2000/XP/2003/Vista/Win7. It is designed to fit any transfer need and allows you to quickly upload or download files in all directions: from FTP Server to Local, Local to Server or Server to Server.