http://www.valamislearning.com Valamis is free award winning social learning environment for sharing and receiving knowledge. Valamis won the Liferay Marketplace App Contest - Best commercial application 2013.

http://discover.liferay.com/marketplace-app-contest

We have received an tremendous amount of support and feedback. We're now looking in to things like Tin Can API, Learning Analytics, Mobile support, Openbadges integration and much more our upcoming releases. Keep the great ideas and feedback coming. We really appreciate your input.