BetterTelnet - for Mac OS - http://www.club.cc.cmu.edu/~rbraun/macssh/
Java Telnet/SSH Applet - Open source, fully featured Telnet/SSH applet/application with embedded VT320/ANSI emulation. It can be used to provide access to telnet services via a java capable WWW browser. - http://javassh.org/
Useless Telnet - A 3D Telnet client for Windows that displays its output like a Star Wars crawl. - http://www.uselesscreations.com/UselessTelnet/
taTelnet - Free (under the GNU General Public License) cross-platform Telnet program with versions for Windows and GNU/Linux. - http://linux.techass.com/projects/tatelnet/
ZOC - A telnet client, secure shell client and terminal emulator that allows a PC to connect to hosts and mainframes via telnet, secure shell (SSH/SSH2) modem, serial cable or ISDN. - http://www.emtec.com/zoc/
Telnet for Unix Terminals - Unix systems with PowerTerm terminal emulation. It is optimized for supporting Windows 3.1/95/98/NT platforms. - http://www.ericom.com/pts.asp
GTW420 - Terminal emulation software for telnet operations for VT220/VT420/ANSI terminals. - http://www.gtw420.com/
LiTE / STEP++ from UASYS.com - Connectivity software products that connect to Linux, SCO UNIX, AIX, and AMOS hosts. - http://www.uasys.com
NetTerm from Intersoft - Performs telnet and dialup. Supports BBSes, Zmodem, and optimization for various online/dialup databases. - http://www.netterm.com
HyperTerminal Private Edition - An update for the HyperTerminal application shipped with Windows. - http://www.hilgraeve.com/htpe/index.html
Powerlan-USA Terminal Emulators - Mac and Windows ports of terminals such as Webterm, 5pm Term, WebTerm X and eXodus. - http://www.powerlan-usa.com