LimeSurvey is a survey service platform that you can use to prepare, carry out and evaluate online surveys. It supports various response formats, multilingual surveys as well as basic reporting and analysis functions.
Unlimited number of surveys, questions and participants
WYSIWYG HTML editor
This application runs on Linux CentOS 7
Minimum requirements: Cloud Server M
You can use any number of free apps as part of your contract. All you need for each app is a separate VM.