Optimizely - A/B testing you'll actually use.
Adobe Target - Adobe Target provides an intuitive user interface and an expanded personalization toolset.
Sonar Network - Automatic daily website analysis
invesp Pii Testing Engine - invesp Pii testing engine offers A/B testing solution for site optimization.
Pirsch Analytics - Cookie-Free, Privacy-Friendly Alternative to Google Analytics.
Experiment Engine - Experiment Engine is a A/B testing solution that harnesses human expertise to automate conversion optimization.