Woffice is a multipurpose Intranet/Extranet Wordpress theme. Built with the latest web technologies and fully responsive, it comes with a : complete Buddypress network, custom login page, projects management, wiki, chat and messaging, files manager, calendar, directory extension, forum, shop (NEW) and so much more features.
Demo: http://themeforest.net/item/woffice-intranetextranet-wordpress-theme/11671924