PuTTY
Open Source
PuTTY is a free SSH client.
Terminator
Open Source
Terminator is a terminal emulator released under General Public License and is available for GNU/Linux Platform.
SecureCRT
Commercial
SecureCRT is an SSH and Telnet client and terminal emulator.
Chrome Secure Shell
Free
Chrome Secure Shell is a xterm-compatible terminal emulator and stand-alone ssh client for Chrome.
KRDC
Open Source
KRDC is a client application that allows you to view or even control the desktop session on another machine that is running a compatible server.
OpenSSH
Open Source
OpenSSH is the premier connectivity tool for remote login with the SSH protocol. It encrypts all traffic to eliminate eavesdropping, connection hijacking.
PAC Manager
Open Source
PAC is a SecureCRT/Putty/etc (connections manager with automations) equivalent for the Linux world.
rdesktop
Open Source
rdesktop is an implementation of a client software for Microsoft's proprietary Remote Desktop Protocol (RDP).
FireSSH
Open Source
FireSSH is a free, cross-platform SSH terminal client for Waterfox.
Compare Xshell with alternatives
Compare Chrome Secure Shell and Xshell and decide which is most suitable for you.