Microstock agency Dreamstime has entered into an agreement with OpenPhoto.net, which provides free stock-image search to a community of 10,000-plus registered users. OpenPhoto.net is a moderated platform for the exchange of user-submitted images for use by nonprofit organizations, including schools and charities. Although a selection of free promotional images is being added to the OpenPhoto.net search, Dreamstime is also marketing its regular-price inventory to users.