"Organic groups enables users with permissions to create and manage their own groups. Community members often want to self organize or spontaneously organize around a topic of interest."
"This module makes it possible to import and export vocabularies and taxonomy terms via XML. Versions from 5.x on also support synonym terms. It requires the taxonomy module to be enabled."
"The Five Star voting module adds a clean, attractive voting widget to nodes in Drupal 5 and 6. Developed by Lullabot and a tentatively officially supported Acquia Carbon project"