Metric.live - Real-time and advanced periodic alerts for Google Analytics.
XTRA.GA - Google Analytics by Email - Awesome summary of your key #s
Quill Engage - Quill Engage takes the confusion out of Google Analytics reporting. Sign up for free and start getting website reports delivered to your inbox.
Analyzely - Rich marketing data analysis inside Google Analytics
SiteOptimus - Site Optimus automatically analyzes your Google Analytics data and provides insights and recommendations to optimize website engagement and conversion
Google Analytics 360 Suite - Enterprise analytics for your marketing.