WoltLab Suite is described as 'PHP-based CMS built for forums and community building' and is an app in the Development category. There are more than 100 alternatives to WoltLab Suite for a variety of platforms, including Online / Web-based, Self-Hosted solutions, Windows, SaaS and Linux. The best alternative is Discourse. It's not free, so if you're looking for a free alternative, you could try Flarum or Google Drive - Forms. Other great apps like WoltLab Suite are phpBB (Free, Open Source), Simple Machines Forum (Free, Open Source), UseResponse (Paid) and Microsoft Forms (Free).
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. Self-hosted Discourse software is free, hosting service is paid.
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. It is the combined successor of esoTalk and FluxBB. It aims to be:
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.
Since its creation in 2000, phpBB™ has become the most widely used Open Source forum solution. Like its predecessors, phpBB™ 3.2 “Rhea” has an easy to use administration panel and a user friendly installation process, which allows you to have a forum set up in minutes.
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).