WoltLab Suite
Discourse
phpBB
Flarum
XenForo
Invision Community
MyBB
Lefora Free Forum
Neurovation.net
Survey Monkey
UseResponse
Google Forms
Flarum
TellForm
Typeform
phpBB
WoltLab SuiteI really like WoltLab, they have a great Forum and the community is generally really nice The customer support is also awesome
Discourse - Discourse is an open source discussion platform built for the next decade of the Internet.
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.
phpBB - Raspberry Pi. The Raspberry Pi is a cheap, credit-card sized computer. The official website uses phpBB for their discussion forums. phpBB is not affiliated with nor responsible for any of the sites listed on the showcase.
UseResponse - Open-source, self-hosted customer feedback software, live chat and helpdesk system that you can install on your server. Organize documentation using knowledge base and get feedback from social networks with centralized system
Flarum - Flarum is the next-generation forum software that makes online discussion fun. It's simple, fast, and free.
Google Forms - Simple web forms from Google.
