Alpaca is the Easy Forms Engine for jQuery / Bootstrap. It is built around JSON schema to keep things simple. Using Alpaca, you can express your forms object model, types, properties and validation logic.
Alpaca comes pre-configured to work nicely with the following web frameworks:
jQuery validation engine is a jQuery plugin aimed at the validation of form fields in the browser (IE 6-8, Chrome, Firefox, Safari, Opera 10). The plugin provides visually appealing prompts that grab user attention on the subject matter.
jQuery.my allows comprehensive validation and conditional formatting of HTML inputs and static fields. Plugin recalculates and redraws interdependent controls automatically.
The jQuery Form Plugin allows you to easily and unobtrusively upgrade HTML forms to use AJAX. The main methods, ajaxForm and ajaxSubmit, gather information from the form element to determine how to manage the submit process. Both of these methods support numerous options which allows you to have full control over how the data is submitted.
jQuery Validation Plugin makes simple clientside form validation trivial, while offering lots of option for customization.
The plugin comes bundled with a useful set of validation methods, including URL and email validation, while providing an API to write your own methods. All bundled methods come with default error messages in english and translations into 36 locales.