Huje Tower - Huje Tower is an Action and Single-player video game.
ServerSuit - ServerSuit is a browser based program that enables remote Linux administration, monitoring, website hosting, and server setup automation.
World of Goo - get it here | read the blog | forum.
RedGate SQL Monitor - SQL Monitor helps you and your team find issues – before they become problems
Prune - Prune is a Puzzle and Single-player video game that is developed by Joel McDonald.
Nagios - Complete monitoring and alerting for servers, switches, applications, and services