Cocorico - Cocorico is a state-of-the art Open Source solution to create an Airbnb or Blablacar for anything.
The Answer Bank - The Answer Bank is the UK’s leading question-and-answer site.
MarketplaceKit - MarketplaceKit is a platform for building different types of online marketplaces.
wikiHow - wikiHow is a wiki based collaboration to build the world’s largest, highest quality how to manual.
Sharetribe - Build your online marketplace business. You don't need a developer.
Blurtit - Blurtit is a Q&A website. You can ask a question or answer on any question.