Bootstrap Dropselect is a simple jQuery plugin that extends bootstrap's dropdown menu into something like github's select menu.
Simpler Sidebar is a jQuery plugin to create simple sidebar menu/navigation. It can be use both for left and right side.
A tutorial about creating responsive and easy to customise mega-dropdown component by using CSS and jQuery.
ScrollMenu is a new interface to replace your old boring scrollbar. It gives a user sense of where they are in a page and how long is that section. With a high customizibility of plugin you can have a unique user experience.
jQuery fatNav is a chubby fullscreen menu with nice hamburger toggle.
Bamboo.js is a basic structural framework for responsive Web Apps that require a sliding menu and a fixed header with scrollable content area. The burger menu button toggles the menu open and close. You can also swipe left or right to interact with the menu. When the browser is greater than a specified breakpoint (desktop) the menu is permanently visible on the left.
Power List Menu is a mobile centric, mult-level menu that magically transforms a nested UL into a series of slide-in panels that occupy no more space than the top level UL itself.
It's ideal on mobile devices where the playground for drop down or flyout menus is limited. The menu supports lazy loading via Ajax of either a child or parent menu, so a portion of the menu can be downloaded only when requested.
Slideout.js is a touch slideout navigation menu for your mobile web apps.
Bootstrap Offcanvas is a super simple, easy to use off-canvas navigation menu for Bootstrap.
Secondary Sliding Navigation is a bold, secondary menu that slides over the main navigation. This approach can be an alternative to a standard dropdown menu, in particular if you want to emphasise more the sub navigation.
A full page menu, that replaces the current content by pushing it off the screen.
A tutorial about creating Multilevel Toggle (accordion) Responsive Navigation Menu using jQuery.
The multi-toggle responsive navigation on smaller screens is similar to nested accordions, the user touches primary level parent item to reveal list under it and when the screen is big enough vertical toggle menu changes to horizontal drop down navigation.
cbFlyout is a jQuery plugin to create responsive off-screen navigation concept.
A tutorial about creating rotating menu on right click using CSS3 transitions and jQuery.