AndFTP is a free, full-featured, interactive FTP client for Android smartphones and devices. It was created by Lysesoft, a company specializing in Android phone file transfer client development.
AndFTP offers support for FTP, FTPS, SFTP and can remember a large number of connection profiles. FireFTP does not yet (as of version 2.4) supports integrity checks using MD5/SHA1 or file compression on the fly (i.e., “MODE Z”), but it does already support multiple languages, ESPV and IPv6.
AndFTP’s official site is http://www.lysesoft.com/products/andftp/.