PuTTY is a free SSH client.

PAC is a SecureCRT/Putty/etc (connections manager with automations) equivalent for the Linux world.

AeroAdmin is a zero configuration free remote desktop software. Use it for quick and easy remote desktop access and PC control.

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.

LogMeIn is a remote desktop management and remote administration solution.

Mosh is a tool used to connect from a client computer to a server over the Internet, to run a remote terminal. Mosh is similar to SSH, with additional feature…

dualmon is a free remote desktop and remote support software.

ASG-Remote Desktop integrates a large variety of connection protocols, allowing you to manage Windows, Citrix, Linux/UNIX- and Macintosh systems remotely.