StatCounter - StatCounter is a simple but powerful real-time web analytics service that helps you track, analyse and understand your visitors so you can make good decisions to become more successful online.
GrowthList - A crowd-sourced list of growth hacks
Histats - Start tracking your visitors in 1 minute!
GrowthHackers Projects - Growth collaboration software for teams 📈
Matomo - Matomo is an open-source web analytics platform
Marketing Examples - A gallery of real world marketing case studies. Updated every day.