AjaxFTP is a drop-in FTP widget that you can use in your Web 2.0 applications. It's modular, skinnable, actively in development, and uses the Ruby on Rails Prototype JavaScript library for a seemless FTP browsing experience.

You can learn more about AjaxFTP at the SourceForge page

Want an ftp widget that actually lets you upload, download and manage directories and files? Check out the commercial version of ajaxFTP.

 
FTP Server
ajaxftp.org
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