Where do I find a list of commonly used features? I've been searching around for some useful features.  I would assume that there are some common features that people use all the time, like an image gallery. Is there a place where people contribute these? I have searched Google and drupal.org but can't seem to find anything.
It looks like the Debut Project collection might be up your alley. From the project description:


  Debut is a set of baseline Drupal features available as apps and designed to work independently yet integrate seamlessly together.