IcoMoon provides a package of vector icons, along with a free HTML5 app for making custom icon fonts. Browse among thousands of pixel perfect icons or import your own vectors.
FitText makes font-sizes flexible. Use this plugin on your responsive design for ratio-based resizing of your headlines
Middleman is a static site generator using all the shortcuts and tools in modern web development.
Nadarei KSS Styleguides lets you create pretty styleguides for your Rails 3.2 projects.
15 simple CSS spinners and throbbers made with CSS and minimal HTML markup.
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.