DreamHostApps looks to be the same set of apps we have available as an Easy One-Click installation. Those are the ones that are DreamHost hosted and can't be reached via FTP. They are, for the most part, a subset of the Advanced One-Click installs where we can modify them with themes and plugins.
Panel's down right now, but from memory, it looks like the same list as DreamHostApps. The odd one being Drupal, which is an Easy and Apps install, but not Advanced.
Edit: Panel is back up, and, yes, the Easy one-clicks are the same ones as DHApps.