Scoop - A command-line installer for Windows
Just Install - just-install - The stupid package installer for Windows.
Windows Remix - Web-based batch software installer with zero dependencies. Recommended first visit after reinstalling Windows or buying a new laptop.
PDQ Deploy - Deploy software quickly with PDQ Deploy. It's simple to install just about anything to multiple computers on your network.
OneGet - OneGet is a unified interface to package management systems and aims to make Software Discovery...
App Grid - App Grid is an alternative to the Ubuntu Software Center.