PuTTY - Popular free terminal application. Mostly used as an SSH client.
ServerSuit - ServerSuit is a browser based program that enables remote Linux administration, monitoring, website hosting, and server setup automation.
Remote Desktop Manager - Remote Desktop Manager is a remote connection and password management platform for IT pros trusted by more than 300 000 users in 130 countries.Add-ons - Remote Desktop .
RedGate SQL Monitor - SQL Monitor helps you and your team find issues – before they become problems
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
Nagios - Complete monitoring and alerting for servers, switches, applications, and services