Optimizely - A/B testing you'll actually use.
SiteGainer - SiteGainer is an A/B testing and conversion optimization platform.
Adobe Target - Adobe Target provides an intuitive user interface and an expanded personalization toolset.
invesp Pii Testing Engine - invesp Pii testing engine offers A/B testing solution for site optimization.
Lander - Lander is a powerful online tool to create Landing Pages.
Experiment Engine - Experiment Engine is a A/B testing solution that harnesses human expertise to automate conversion optimization.