net2ftp is a web based FTP client. Use it at http://www.net2ftp.com or install it on your own web server (PHP needed, MySQL optional).
Features: browse, copy, move, delete, upload, download, upload-and-unzip, zip-and-download, zip-and-save, zip-and-emai
Fantastic program, I use it all the time, it works very well.
A very useful tool. Had just the right type of interface for what we needed.