You can see an example of an experiment here.

I'm now providing free hosting for Ibex (0.3) experiments over at the Ibex Farm.

Google group for discussion of Ibex and the Ibex Farm: http://groups.google.com/group/ibexexperiments

This software allows self-paced reading and speeded acceptability judgment tasks to be run online through a web browser. The server is written in Python and stores results in a CSV file, suitable for later analysis using R, Matlab, etc.

The 0.3 betas should be used in preference to the 0.2.x releases, since they are easier to deploy and less buggy. For version 0.3, the software has been renamed to "Ibex" ("Internet Based EXperiments"). Documentation for this release is at Documentation03, and in PDF form here.

The code is developed in a git repository (see Source).