LimeSurvey is an free open source online survey application written in PHP based on a MySQL, PostgreSQL or MSSQL database. It enables users without coding knowledge to develop, publish and collect responses to surveys. LimeSurvey is available in more than 49 languages and dialects and it uses a UTF-8 character set.
Surveys can include branching, custom preferred layout and design and can provide basic statistical analysis of survey results. Surveys can be either publicly accessible or be strictly controlled through the use of “once-only” tokens for each survey participant. Additionally results can be anonymous be separation of participants data and result data, even for controlled surveys.