Zenphoto Gallery Aug 13, 2010 / Updated: Apr 20, 2013
Zenphoto Gallery allows to use Zenphoto albums in WordPress posts. Other plugins need access to Zenphoto's database, not so this one. Given a JSON frontend to Zenphoto's RSS facilities (included), Zenphoto Gallery pulls the images from both the general images feed and album feeds. It also provides some means to customize gallery layout and behaviour.
This extension is hosted and (hopefully maintnained) by its author.