DOM Monster is a cross-platform, cross-browser bookmarklet that will analyze the DOM & other features of the page you're on, and give you its bill of health.
This little hack allows you to run two instances of Dropbox at the same time. Very useful if you have a work and a personal account.
Mockup phone and tablet prototypes for iOS 7, Android Jelly Bean and Windows 8 faster with this set. Includes keynote, omnigraffle and pdf files.
A documentation system to produce wireframes, maps, flows, storyboards, plans, style guides, specs, usability testing reports, and prototypes.
Interactive edition of Josef Albers' Interaction of Color, one of the most influential books on color ever written.
PhoneGap is a free and open source framework that allows you to create mobile apps using standardized web APIs for the platforms you care about.
Learn about real typography from this complete online book by Matthew Butterick
Because choosing an OSS license doesn’t need to be scary. MIT, Apache and GPL licenses explained.
Prose provides a beatifully simple content authoring environment for CMS-free websites. It's a web-based interface for managing content on GitHub.