Topsl (The Online Psychology Survey Language) is a programming language designed to make it easy to write sophisticated Web-based surveys. It features integrated support for longitudinal studies and arbitrary branching and looping on longitudinal data.
Note: we have moved to Github:
https://github.com/Nivocer/WebEnq
WebEnq is a online survey tool intended for development organisations: multi-lingual surveys, no javascript or cookies to fill in a survey, output as SPSS.