The first gallery was released in April 2001, it is currenlty in its third version, wich was released on October 2010.
What is it
Gallery is a web-based system that helps you manage your images in your webpage. Gallery makes it easier to create and manage your photo albums using an intuitive user interface.
Image management includes the following settings: automatically generated thumbnails; size adjusting; aligning, classification, labeling and search of images and much more. For albums and images, it is also possible to give access, editing and exclusion rights for every user. The ideal way to create group projects - generate accounts for your family and friends so they can upload pictures and manage their own images on your website.
Oficial Site: http://galleryproject.org/