jQuery

1.) Valid8 – An input field validation plugin for Jquery

2.) Easy Form Validation Requires No Javascript Library

3.) Really Easy Field validation with Prototype

4.) Mootools Form Validation +

5.) A jQuery inline form validation, because validation is a mess

6.) Easy Form Validation With Spry Widgets

7.) ProtoFormClass Form Validation + Ajax Submit

8.) jQuery for Designers – Ajax Form Validation Example

9.) fValidator

10.) Validation Hints coupled with Form Field Hints

11.) JS Validate

12.) Live validation Validation as you tyoe!

13.) Jval – jQuery Form Field Validation Plugin

14.) Phatfusion Validate

15.) jQuery Validation Plugin

16.) Simple jQuery form validation

17.) Easy client-side web form validations

18.) Form Validation using jQuery