Build a Feed You Can Cut 'n Paste, will help you format a feed's display with the information you want to use on your web site. All you need to enter is the URL for the RSS source.
W3C Markup Validation Service, a free service that checks Web documents in formats like HTML and XHTML for conformance to W3C Recommendations and other standards.
“For people who make websites” A List Apart Magazine explores the design, development, and meaning of web content, with a special focus on techniques and benefits of designing with web standards.
Smashing Magazine is an online magazine for professional Web designers and developers, with a focus on useful techniques, best practices and valuable resources.
A MIT-licensed template for HTML5 websites that includes a lot of CSS and JS tweaks and optimizations. It provides support for JQuery, Google Analytics, old browsers, etc.
MIT-licensed HTML5 template and CSS framework built for responsive design based on a 12-column grid. The boilerplate contains no JavaScript, just HTML, CSS and example site icons (favicon & iOS).
You most certainly know about Twitter Bootstrap - the popular front end framework for building websites and apps. It favors simple, responsive design, and comes bundled with a sensible default stylesheet, a number of useful jQuery plugins ...
Grayscale is a free Bootstrap theme with a dark color scheme, smooth scrolling page animations, and a collapsing top navigation bar. It works great for portfolios, businesses, and more!
Bootstrap themes and templates curated in one totally free, high-quality collection. Bootstrap designers and developers can use these free templates and themes to kickstart Responsive Web Design projects.