Sredird is a serial port redirector that is compliant with the RFC 2217 "Telnet Com Port Control Option" protocol. This protocol lets you share a serial port through the network. RFC 2217 was orginally implemented in Cisco Terminal Servers in IOS version 11.x.
Control- and Status-Utility for Tr*ndCh*p-based ADSL-modems. It allows to access the devices' console-service and retrieves their current staus. For example those TC3084 devices are supported: Lucent CELL 19A-BX, Speed Modem 50B(+) and 200 by Arcor.
BomgaG is a BBS/telnet client(or robot) to make the BBS world much more wonderful/hackable for a unix-lover, you can say it's a unix-version KKman or PCman, but much stronger. You can script in perl to control everything on BBS.
SWAL is a program that can launch as a service (or standalone) and monitor other services and control other programs. Written in C++ and might have some .NET components (planning on a linux port)
ProxyTerm (pterm) is a simple tool to control console applications running on a remote machine. Unlike in telnet/ssh, applications are not terminated if the connection is shut down, but are kept running for subsequent connections from pterm clients.