FitMe.js is a really small jQuery plugin which automatically resizes, crops and centers your image to fit within its parent container while maintaining aspect ratio.
Simple Fullscreen Background Image Plugin with jQuery
jQuery Plugin For Cropping & Resizing Images - easyCrop
Minimalist Image Resize & Crop Plugin For jQuery - imgFitter
jQuery Plugin To Scale Images To Full Window - fullBleed
Small jQuery Plugin For Dynamic Image Resizing - FitMe.js
jQuery Plugin For Setting Responsive Fullscreen Size To Elements - toFullScreen.js
jQuery Plugin To Resize Images To Fit Any Container - image-cover.js
Resize & Re-center Image To Fit Its Container - jQuery resizeImageToParent.js
Crop & Resize Images To Fit Containers - resizeAndCrop
Scale & Align Images To Fit Their Parent Containers - Image Scale