- 960 Grid System - An effort to streamline web development workflow by providing commonly used dimensions, based on a width of 960 pixels. There are two variants: 12 and 16 columns, which can be used separately or in tandem.
- Compass - Open source CSS Authoring Framework.
- Bootstrap - Sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development.
- Font Awesome - The iconic font designed for Bootstrap.
- Zurb Foundation - Framework for writing responsive web sites.
- SASS - CSS extension language which allows variables, mixins and rules nesting.
- Skeleton - Boilerplate for responsive, mobile-friendly development.
- Flat UI Flat design
- Scalable and Modular Architecture for CSS - Learn how to structure your CSS to allow for flexibility and maintainability as your project and your team grows.
- CSS Property Index - All properties in an easy-to-digest form.