Pep
Pep, a lightweight jQuery plugin for kinetic drag on mobile/desktop
Device.js
Device.js makes it easy to write conditional CSS and/or JavaScript based on device operating system (iOS, Android, Blackberry, Windows, Firefox OS), orientation (Portrait vs. Landscape), and type (Tablet vs. Mobile).
Foo Table
jQuery plugin to make HTML tables responsive
Brick
UI Web Components for Mobile Web Apps
Onsen Ui
Custom Elements-Based HTML5 UI Framework for Building Your Mobile Front End
Ionic
Advanced HTML5 Mobile App Framework. A beautiful front-end framework for developing hybrid mobile apps in HTML5. Best friends with AngularJS.