GrowthList - A crowd-sourced list of growth hacks
Site Rank Data - View historical rank information of websites via time series charts.
GrowthHackers Projects - Growth collaboration software for teams 📈
Q-Stats - Get free marketing insights for every question on Quora.
Marketing Examples - A gallery of real world marketing case studies. Updated every day.
HypeStat - HypeStat is free statistics and analytics service, where you can find information about every website.