Scalable makes the elements scalable to fit inside the container area.
Lity is a ultra-lightweight, accessible and responsive lightbox plugin which supports images, iframes and inline content out of the box. It requires jQuery or Zepto
jcSlider is a jQuery plugin to create responsive slider with CSS animations.
SmartPhoto.js is an easy to use responsive image viewer especially for mobile devices.
Restive.js is a designer-friendly jQuery toolkit for building mobile-friendly websites.
Using a combination of smart device detection, advanced breakpoints management, and timely CSS class additions, restive.js will make it easier for you to build mobile-friendly and/or responsive Web pages.
GridTab is a lightweight jQuery plugin to create grid based responsive tabs.
Notyf is under MIT licence.
EasyFader is an ultralight fading slideshow plugin for responsive layouts by using jQuery.