Yahoo UI Library

Yahoo’s Design Pattern Library has become my go-to source for UI solutions. The site presents common problems within a specific context and suggests optimal solutions with a pattern. They also provide much of the scripting to run each pattern with the Yahoo! User Interface (YUI) Library, which is a set of JavaScript utilities and controls for building richly interactive web applications. I’m no UI developer by any stretch of the imagination, but I still prefer jQuery and its limitless plugins.