ezMark is a jQuery Plugin that allows you to stylize Radio button and Checkbox easily. Its very small (minified version is ~1.5kb) compared to other similar scripts. It has been tested and works on all major browsers (IE 6/7/8, Firefox, Safari, Chrome) and it gracefully degrades.

To customize the default checkbox/radiobutton image, simply change the background image (checkbox-black.png/radio-black.png) and CSS (ez-checkbox/ez-radio) and (ez-checked/ez-selected) accordingly.

Requirements: jQuery Framework
Demo: http://www.itsalif.info/content/demo-ezmark-jquery-plugin/
License: MIT License