ConnectBot is a powerful open-source Secure Shell (SSH) client.
Secure Connection through SSH Tunnel + SSL Support with flexible customization
Secure Connection through SSH Tunnelier with More Advanced Features
Ping,Traceroute,Nmap,Port scanner,WiFi analyzer,Telnet,SSH,WhoIs,DNS lookup etc.
Secure, fast, free, multi-touch VNC Client for Windows, Linux, Mac with SSH.