Telnet

BetterTelnet
for Mac OS
http://www.club.cc.cmu.edu/~rbraun/macssh/

GTW420
Terminal emulation software for telnet operations for VT220/VT420/ANSI terminals.
http://www.gtw420.com/

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/

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

Powerlan-USA Terminal Emulators
Mac and Windows ports of terminals such as Webterm, 5pm Term, WebTerm X and eXodus.
http://www.powerlan-usa.com

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/

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

Telnet.org
Provides information and resources on telnet applications and the protocol itself.
http://www.telnet.org/

Useless Telnet
A 3D Telnet client for Windows that displays its output like a Star Wars crawl.
http://www.uselesscreations.com/UselessTelnet/

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/