Openxtra - www.openxtra.co.uk provide a range of testing and monitoring equipment which Sentinel can provide , install and configure for your needs

SysInternals - www.sysinternals.com - useful utilities and information to help manage and diagnose system problems - now owned by Microsoft

Sensorwatch - www.Sensorwatch.net - monitoring servers, environment and just about anything else

Tartan IS - a Belfast based Business partner www.tartanis.co.uk