This Side is in PHP in Front end and MySQL is in backend. 

This Site is Developed uising OSCommerice   

URL :  http://www.floralart.us

Client side is in Java open source free technology  that are JSP and JSF Spring and hibernate.

JBoss web server is used (open source and free)

Backend database is MYSQL (it is free).

URL : http://www.tigerdive.com