UXTesting - Discover how your mobile users feel
Open Census Data - Visualize & download neighborhood demographic Insights
Startup Timelines - How the frontpages of famous startups changed over time
Passport Index 2016 - View the world's passports and see how they rank
Laws of UX - Key maxims that designers must consider when building UX
500 Hunters - Forever changing list of the Top 500 Hunters on Product Hunt