Which tools do you use to monitor and measure conversion rate optimization?

Conversion optimization involves a lot of steps for which you have to work with tools as well as human interaction to determine the best conversions. It involves steps like A/B or Multivirate Testing, Heat mapping, User Experiance(usability testing), Funnel optimization, audience segmentation, user survey etc   You can use the following tools to measure and test different components of Conversion optimization :

Analytics :Google Analytics (free), KISSMetrics, Mixpanel, Segment.io, Chartbeat, Clicky, RJ Metrics, Woopra, Chart.io, Custora, Sumall, GoodData, OmnitureUser Surveys :Qualaroo, SurveyMonkey, SurveyGizmo, PollDaddy, Survey.ioUser Testing ( Heat Mapping, Click Density) :CrazyEgg, Click TaleConcept Testing :Balsamiq, Cacoo, BrowershotsA/B Split & Mutlivariate Testing ;Optimizely, Visual Web Optimiser, Google Content Experiments, UnbounceUser Testing (feedback) :UserTesting, VerifyApp, mTurk