ManageEngine Desktop Central is a mid-market focused systems management solution that handles several tasks including software deployment, remote control, power management, patch management, asset management and USB management.
Spiceworks is a free help desk and inventory solution with heavy community integration made possible through advertising. A handful of other tools are also provided including an impressive network monitoring product.
The K1000 is mid-market focused systems management solution available as both a physical and virtual appliance. It includes discovery/inventory, asset management, deployment, configuration management a service desk and more.