cPanel - With its first-class support and rich feature set, cPanel & WHM has been the web hosting industry's most reliable, intuitive control panel since 1997.
Total Network Inventory - Total Network Inventory is a piece of software designed to help with managing software inventory and auditing PC systems.
Webmin - Webmin is a web-based interface for system administration for Unix.
Lansweeper - Lansweeper discovers Windows, Linux and Mac machines in your network.
Vesta Control Panel - – What I love about Vesta is that it's fast and easy to use
Spiceworks Help Desk - Help desk software features that work for IT