ThemeForest - X Docs Knowlegebase & Documentation 13087234
X Docs Knowlegebase & Documentation Template is specially created for those who are selling their items on marketplaces. bbpress forums plugins can be used for forums. Also a nice and clean documentation help template is included to create html documents.
A powerful product documentation can be created using xdocs. Advance search functionalities, article list by categories and tips or notification can be very useful to make documents more attractive.