sshmenu - SSHMenu is a GNOME panel applet* that keeps all your regular SSH connections within a single mouse...
PAC Manager - PAC Manager
DuoRDP - DuoRDP is a tool that used to quick connect to multiple windows server
SecPanel - SecPanel is an Ssh GUI for Unix.
ShellCraft - ShellCraft is an ssh GUI for Unix.
PuTTY - Popular free terminal application. Mostly used as an SSH client.