jFormer is form framework that is written in PHP, Javascript, and CSS. jFormer allows developers to spend less time styling coding and validating their forms, and spend their time actually working with the data instead. It’s only 18K gzipped.
SheepIt is a very userful jQuery plugin that allows you to clone form elements dynamically. It is very useful to develop advanced forms that require the same type of load data multiple times. Now you can simple clone any field or form in your web application. Visit Project page or see Demo