PHP is first an interpreted scripting language (actually precompiled opcodes), free, open source and distributed under a license authorizing the modification and redistribution
The Web Developer extension adds various web developer tools to a browser. The extension is available for Chrome, Firefox and Opera, and will run on any platform that these browsers support including Windows, OS X and Linux.
AngularJS Material is both a UI Component framework and a reference implementation of Google's Material Design Specification. This project provides a set of reusable, well-tested, and accessible UI components based on Material Design