Each version of Pressflow is API-compatible with the same major Drupal version. For example, Pressflow 6 is compatible with all Drupal 6 modules. Pressflow 6 also integrates the SimpleTest system from Drupal 7 and the CDN support patch.
The official @github repository of the OpenPhoto frontend software. A photo sharing and photo management web interface for data stored "in the cloud" (i.e. Amazon S3, Rackspace CloudFiles, Google Storage).