LimeSurvey (formerly known as PHPSurveyor) is an online survey application, written in PHP based with a MySQL database backend. LiveSurvey enables users without any technical knowledge to develop, publish and collect responses to surveys.

Surveys can include branching (where the questions depend on previous answers), custom preferred layout and design (using a web template system), 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` security tokens for each survey participant. Additionally, results can be anonymous by separation of participants data and result data, even for controlled surveys.