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.
AppSales - Find the best Android apps and games from Google Play that are currently discounted or free for a limited time
Histats - Start tracking your visitors in 1 minute!
Fnd - Browse Apple App Store and iTunes on the Web
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.
TheAppStore.org - Find apps by rating, price, category, updated date and more