Missoulaadoptables is a project mainly written in PHP and JAVASCRIPT, it's free.
Missoula Adoptables was created for Software Engineering at the University of Montana-Missoula by Jon-Michael Deldin and Evan Cummings.
Clone the repository
git clone git://github.com/jmdeldin/missoulaadoptables
Create a VirtualHost or move the repo to your htdocs directory
Create a database and import the SQL files in app/conf:
mysql -u
Edit app/conf/conf.ini.dist and save it as app/conf/conf.ini