Stacer - Ubuntu system optimizer
Just Install - just-install - The stupid package installer for Windows.
Ultimate Windows Tweaker - Ultimate Windows Tweaker is a freeware Tweak UI Utility for tweaking and optimizing Windows.
Scoop - A command-line installer for Windows
Ubuntu After Install - Automated installation a lot of useful extra software on Ubuntu after the initial desktop install.
Windows Remix - Web-based batch software installer with zero dependencies. Recommended first visit after reinstalling Windows or buying a new laptop.