UXTesting - Discover how your mobile users feel
Passport Index 2016 - View the world's passports and see how they rank
Startup Timelines - How the frontpages of famous startups changed over time
Two Centuries of U.S. Immigration - Visualizing who immigrated to the U.S. between 1820 and 2013
Laws of UX - Key maxims that designers must consider when building UX
Product Hunt Map - Live map of recent hunters and makers