Initializr is an HTML5 templates generator to help you getting started with a new project based on HTML5 Boilerplate.
Collection of vintage photo styles for Fireworks
a practical guide to web typography
A complete collection of web safe CSS font stacks
A tool for sorting CSS properties in specific order. They have plugins for Sublime Text 2, TextMate & Coda.
A visual timeline of user interfaces history
Large sketch sheets collection with many different canvasses, grids and PSD grid templates.
The Noun Project is a community site that collects, organizes and adds to the highly recognizable symbols that form the world's visual language, so we may share them in a fun and meaningful way.
CSS trick to force gradients in texts.
iOS Human Interface Guidelines describes the guidelines and principles that help design a superlative user interface and user experience for iOS apps.