This jQuery plugin makes simple clientside form validation trivial, while offering lots of option for customization. That makes a good choice if you’re building something new from scratch, but also when you’re trying to integrate it into an existing application with lots of existing markup. The plugin comes bundled with a useful set of validation m... More information

Method input validation and runtime checks that report errors or throw exceptions when failures are detected. Check out the code snippets available at https://github.com/AArnott/Validation/tree/master/My%20Code%20Snippets and make your input validation even easier with auto-completion for quoted parameter names.

jQuery plugin that unobtrusively sets up jQuery.Validation.

Validation attributes that can be used in any .NET 4.0 project to supplement the existing Data Annotations attributes. If you are using MVC3 and also want client validation, use the DataAnnotationsExtensions.MVC3 package.

A validation library for .NET that uses a fluent interface to construct strongly-typed validation rules.

Legacy package, jQuery.Validation.Unobtrusive is now included in the 'Microsoft.jQuery.Unobtrusive.Validation' package.

Validation attributes that extend Data Annotations and provide integrated server and client side validation (using unobtrusive jquery validation).

A Validation Library plugin for KnockoutJS. An extensible and pluggable framework for performing model-based Form and UI validation.

The Enterprise Library Validation Application Block provides useful features that allow developers to implement structured and easy-to-maintain validation scenarios in their applications.

FubuValidation - have validation your way, whatever way that happens to be

A FubuMVC implementation of FubuValidation

ASP.NET MVC 3 integration for FluentValidation

Provides a lightweight validation framework targeting objects, and offering utilities for lightweight property validation. * Provides basic support for DataAnnotations on objects.

This component allows the Enterprise Library Validation Application Block to integrate with WCF.

ASP.NET MVC 4 integration for FluentValidation

Adds Fluent Validation support to Nancy.

Catel.Extensions.FluentValidation library which contains fluent validation extensions.

The only argument validation file you need, with full refactoring support and strong-typing. Examples: Guard.NotNull(() => value, value) Guard.NotNullOrEmpty( () => stringValue, stringValue)

Adds Data Annotation validation support to Nancy.

MVC Foolproof Validation aims to extend the Data Annotation validation provided in ASP.NET MVC. Includes such annotations as [GreaterThan], [RequredIfTrue], [RequiredIfRegExMatch] and more. It also provides simply method for creating custom contingent validators.