Simple and flexible HTML, CSS, and Javascript for popular user interface components and interactions
Bootstrap is built for you...
Bootstrap provides simple and flexible HTML, CSS, and Javascript for popular user interface components and interactions. In other words, it's a front-end toolkit for faster, more beautiful web development. It's created and maintained by Mark Otto and Jacob Thornton at Twitter.
This package is superb, it implements a basic framework for every aspect of a websites style and presentation needs. Pros: Excellent starter kit for website developers.