If you have an Android phone and you have a website where sometimes you connect via FTP, I will present a free FTP client for Android that has impressed me is called AndFTP that supports FTP, SFTP and SSH to connect to servers remote.
Like any FTP client includes the necessary functions such as remote file browser, support for upload and download files, open, rename, copy, cut, paste, move files and more.
To download AndFTP have to look at the Android Market as AndFTP, or scan the QR code below with your phone.