OpenClinica - OpenClinica is an open source clinical trials software.
Typeform - Create beautiful, next-generation online forms with Typeform, the form & survey builder that makes asking questions easy & human on any device. Try it FREE!
Castor EDC - Castor offers you a user-friendly and fully featured application for electronic data collection.
Survey Monkey - Create and publish online surveys in minutes, and view results graphically and in real time. SurveyMonkey provides free online questionnaire and survey software.
Medidata CTMS - Medidata CTMS seamlessly integrates with Medidata Rave to provide real-time views into study progress without manual tracking.
Google Forms - Simple web forms from Google.