Sfinx

Sfinx is a web service for collecting data from empirical studies utilizing Ruby on Rails and Posgresql. You can create as much experiments as you like, divide each experiment into several parts, and collect variables of various types in each part. Java and Javascript libraries are available to ease sending data from an experiment to the web service. The data are automatically statistically processed using confidence intervals. The source code is available in the Bitbucket public repository.