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.
Adobe Target - Adobe Target provides an intuitive user interface and an expanded personalization toolset.
Histats - Start tracking your visitors in 1 minute!
Optimizely - A/B testing you'll actually use.
AFSAnalytics - AFSAnalytics.
Webeo - Dynamically change your B2B website and tailor your website experience to each of your specific audiences to drive increased engagement, conversion and leads.