Creep.js is a really small (less than 1kb) jQuery smooth scroll plugin which makes anchor links smoothly scroll the page to specific elements instead of a straight jump.
Accrue.js is a simple, fast, flexible jQuery plugin for providing loan and interest calculations e.g. loan amortization schedule, interest comparison calculator on your web page.
Squirrel.js is a simple yet useful jQuery plugin that automatically and temporarily stores the information from the form as you type in fields or change values