ManualsLib - Just enter the keywords in the search field and find what you are looking for!

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.

Manuzoid - Repository that includes user manuals for various products

SurveyJS - Simplify data collection in your JavaScript application with SurveyJS UI components. Create and style dynamic JSON-based forms using a fully integrated form builder that features a CSS theme editor and GUI for conditional rules and form branching.

ManualAgent - Manuals and guides

Matter - Create a feedback-focused culture in Slack with Matter!