Ladda buttons concept for Bootstrap. Buttons with built-in loading indicators, effectively bridging the gap between action and feedback.
ArtDesignUI is a jQuery library for style control web elements (button, input, textarea, radio, checkbox, tab, layout, icons) that include 9 jQuery plugins.
Some inspiration for elastic components with SVG shape animations for enhanced UI interactions.
Bellows is a responsive, mobile-first accordion UI module for progressive disclosure on the web. Also Bellows supports jQuery.
WebUI Popover is a lightweight jQuery popover plugin that enchance the popover plugin of Bootstrap with some awesome new features. It works well with Bootstrap.
Simply Toast is a simple toast messages for jQuery. All css styles were extracted from bootstrap, so if you already use bootstrap, you don't need include plugin css file.
Primarily intended for use with forms where it gives users immediate feedback upon submit rather than leaving them wondering while the browser does its thing.
Avgrund is a modal concept which aims to give a sense of depth between the page and modal layers. Uses CSS transforms to scale components and CSS filters to blur the page. Built for the fun of it, not intended for any practical use.
Zino UI is jQuery based, WAI-ARIA compatible, user interface framework consist of 25+ different components. Cross-platform user interface framework for you Web & Enterprise applications. It's free to use for your personal or non-profit website projects.