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.
Scoop - A command-line installer for Windows
Chocolatey - The sane way to manage software on Windows.
Windows Remix - Web-based batch software installer with zero dependencies. Recommended first visit after reinstalling Windows or buying a new laptop.
Ninite - Ninite is the easiest way to install software.
App Grid - App Grid is an alternative to the Ubuntu Software Center.