Chocolatey - The sane way to manage software on Windows.
Patch My PC - Patch My PC Updater is a free, easy-to-use program that keeps over 300 apps up-to-date on your computer.
Ninite - Ninite is the easiest way to install software.
ManageEngine Desktop Central - Desktop Central is a Desktop Management and Mobile Device Management Software for managing desktops in LAN and across WAN and mobile devices from a central location. It supports managing Windows, Mac and Mobile devices running iOS 4 and above
FileHippo App Manager - Scan your computer for installed apps to check if updates are available.
Scoop - A command-line installer for Windows