XSLT based Powerful And Open Source CMS: Symphony
Symphony is a XSLT-powered open source CMS that is created with PHP & uses MySQL for storing data.
It offers a very flexible usage as the data, logic & templating layers are all independent, meaning that whatever you implement can be modified, added or removed with minimum effort.
Symphony has a light & elegant backend that helps you focus on your work with features like bulk editing, drag’n drop ordering of items & much more.
The application has a growing library of extensions (130+) which can help you improve the functionality it offers.