platformabuse.org is a knowledge source of technological harms and mitigations to guide safer product development. Product teams today are underprepared for the ways in which their technology can harm or underserve people. Select your product’s features, and check for lurking harms.
Bootstrap is a web development template from two folks at Twitter which aims to make designing websites easy and elegant. Designed to be device-responsive, so the CSS adapts based upon the browser and platform viewing a site. There is a compiled and minified version that you can download, as well as a version that has all of the code in its basic form. There is even a web-based customizer you can use to tailor what you want the page to look like before you start developing it.