LimeSurvey is the tool to use for your online surveys.
Whether you are conducting simple questionnaires with just a couple of questions or advanced assessments with conditionals and quota management, LimeSurvey has got you covered. LimeSurvey is 100% open source and will always be transparently developed. We can help you reach your goals.
Explore the vast possibilities you have to create your survey professionally with LimeSurvey. Starting with the inbuilt template editor through to advanced scripting abilities inside of the question editor and the mighty expression manager. However, if some feature you need is missing, you may also submit a feature request.