Discourse is an open source discussion platform built for the next decade of the Internet. A modern forum, everything's been redesigned to be easy.
Flarum is free, open-source forum software with a focus on simplicity. You can use Flarum to easily set up a discussion forum for your website. Flarum is developed openly on GitHub.
Google Forms, part of Google Drive , is a tool that allows collecting information from users via a personalized survey or quiz. The information is then collected and automatically connected to a spreadsheet with the same name.
UseResponse is a customizable Community Feedback and Support Software can be installed on your server as a PHP script or used in Cloud as SaaS.
Simplistic surveys by Microsoft. You can easily create surveys,quizzes and polls to collect customer feedback. Free with your Office 365 credentials or Microsoft account (Hotmail, Live, or Outlook.com).
OhMyForm is a free and open source alternative to commercial form creators like Typeform and Google Forms providing all the features you need to run, administer, analyze and distribute forms for free.This app doesn't have any features at the moment.