See how one developer approaches making pixel-perfect CSS3 breadcrumb navigation here.

This way of making such menus addresses the most common problems one might encounter in the process of building them.

It’s nothing ground-breaking, for sure, but at the very least it’s interesting to see problem solving in action.

jQuery-menu-aim is a plugin that improves dropdown menu functionality by detecting the direction of the mouse.

Basically, the plugin detects mouse movement and can thus predict whether the user wants to use the sidebar or slide further down.

Here’s an in-depth analysis that shows where the inspiration for the plugin came from, how it’s implemented in Amazon, and what problems it can solve.

Snap.js is a JavaScript library for creating “JavaScript shelves”.

Here’s an animated demonstration that explains the purpose of the library better.

The library is standalone and highly functional as well: CSS3 powered animations; drag support; define your own easing mode; etc.

All in all, Snap.js is an elegant navigation model for full-screen web apps such as games (perhaps) and websites (more likely).

FlexNav is a mobile-first approach to creating site menus.FlexNav supports touch screens and adapts to smaller screen sizes without a second thought.

FlexNav supports modern browsers and IE versions from 7 and up. Besides touch events it supports keyboard tab navigation and hover reveal for desktop. It even works with JavaScript disabled.

Responsive Nav is a standalone JS library for creating a toggled navigation for smaller screens.

Responsive Nav weighs a mere 1.7 kilobytes and supports touch events. It has cross-browser support and supports dinosaur-browsers (IE6 included).

What’s more, this neat plugin works with disabled JavaScript, and even on screen readers.

Intro.js is a JavaScript library for creating instructions and step-by-step guides for websites.

Intro.js weighs a mere 6 kilobytes together with the styling. It has keyboard navigation and an easy to use API.

Browser compatibility seems scarce at the moment, but it’s on the way — so says the developer.