opsi - in production use since 10 years - provides a tool for remotely installing operating systems, deploying software and inventorying hard- and software. While it is based on a Linux server its primary targets are Windows work stations.
SofTulz.Net Products, Purgos, COM Components, Designed for computer management, of any sized network. Utilizing WMI to automate the administration of Windows 2k, XP and 2003 on local or remote networks.