SwiFTP!

SSHDroid is a SSH server implementation for Android.This application will let you to connect to your device from a PC and execute commands (like "terminal" and "adb shell") or edit files (through SFTP, WinSCP, Cyberduck, etc...).

freeFTPd is a FTP/FTPS/SFTP server that enables user to access remote files over TCP/IP network such as Internet. Unlike FTP, FTPS and SFTP protocols provide security and strong encryption of data - great for insecure network.