Stack Overflow - Community-based Q&A part of the Stack Exchange platform.
Nextcloud Hub - On-premises, enterprise collaboration solution for documents, emails, calendars and more.
The Answer Bank - The Answer Bank is the UK’s leading question-and-answer site.
GreenOrbit - Intranet software with everything you need, built in
Blurtit - Blurtit is a Q&A website. You can ask a question or answer on any question.
Oak Engage - Oak Engage is a digital workplace for enterprises that need to communicate with their workforce. Connect your teams. Engage your people.