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.
Ralpha Image Resizer - High-speed image batch conversion tool
WinSCP - WinSCP is an open source free SFTP client and FTP client for Windows.
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Cyberduck - A libre FTP, SFTP, WebDAV, S3, Backblaze B2, Azure & OpenStack Swift browser.
Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.