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.
Modelio - Modelio is an open source modeling tool supporting natively UML, BPMN and model exchange with XMI.
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!
Diagramo - Diagramo is an online flowchart software - diagrams (create, edit and share)
Google Forms - Simple web forms from Google.
UML Designer - UML Designer provides a set of common diagrams to work with UML 2.5 models.