Coppermine is a multi-purpose fully-featured and integrated web picture gallery script written in PHP.

TinyWebGallery is a free php based photo album / gallery

Gallery is an open source web based photo album organizer

LinPHA is an easy to use, multilingual, flexible photo/image archive/album/gallery

Piwigo is a photo gallery software for the web

Pixelpost is an open-source, standards-compliant, multi-lingual, fully extensible photoblog application for the web

a simpler web photo gallery

Create your personal Photo Album / Gallery in just seconds

Shutter allows you to store and share your photos

4images is as a web based PHP and MySQL for displaying images on the Internet