Google Analytics - Improve your website to increase conversions, improve the user experience, and make more money using Google Analytics. Measure, understand and quantify engagement on your site with customized and in-depth reports.

Google Open Source - All of Googles open source projects under a single umbrella

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.

SmallDevTools - Handy developer tools with a delightful interface

Histats - Start tracking your visitors in 1 minute!

whatdevsneed - This is whatdevsneed.