PHP: Hypertext Preprocessor is a server-side scripting language designed for Web development, but also used as a general-purpose programming language. PHP code may be embedded into HTML code, or it can be used in combination with various web template systems, web content management systems, and web frameworks.
Optimizely is a website optimization platform providing A/B and multivariate testing with tools to track engagement, clicks, conversions, sign ups & more.
Qualtrics makes sophisticated research simple and empowers users to capture customer, product, brand & employee experience insight. Measure customer experience, track employee engagement, improve brand awareness and gather product feedback in a one powerful platform.