Poor Man's Telnet is an implementation of a line-based telnet client, written as a bash script.
SimpleTelnet is a small telnet client suitable for embedded systems. Implemented in C, it works on any POSIX platform.
Telconi Terminal for Cisco IOS
Telconi Terminal for Cisco IOS is a network management productivity application for network administrators, designed to work with any Cisco IOS® based router, switch or other device. As a multi-platform application, we will support all relevant environments.
Tiny SHell is a lightweight client/server clone of the standard remote shell tools (rlogin, telnet, ssh, etc.). It provides remote shell execution and file transfers.