Helprace is customer service software. It consists of a feedback system, community, a knowledge base and a help desk all in one platform:
[*]users can suggest ideas, questions and praise (you can act on them)
[*]upload docs, users can search for all content from the portal
[*]solve customer issues using a help desk ticketing system Free plan for small teams, as well.
Download link: http://helprace.com/signup