"KiTTY is a fork from version 0.60 of PuTTY, the best telnet / SSH client in the world." It adds many additional useful features to the original PuTTY application.
"Get Console is a portable field engineer app that runs on Apple iPad and iPhone, enabling Serial, Telnet and SSH connectivity to devices in the field, full session logging, configuration script management, remote control via web and integration into existing service desk systems. "