Flexible Survey is open source, simple and extensible software to create online surveys.
Features:
- Surveys defined in XML
- Wide and extensible set of available questions
- Branching - AND/OR/NOT operators
- Answers filtering
- Answers randomization
- Results stored in PostgreSQL or CSV file
Good solution for users demanding high flexibility of the software.
The Cornell Web Lab Collaboration Server is a suite of tools and services for GUI-based extraction, analysis and sharing of archived web data. See http://weblab.infosci.cornell.edu/ and http://www.cs.cornell.edu/~weigel for details about the project.