jLinq is a 100% JavaScript library that allows you to perform complex queries on arrays of JSON data.

Backbone supplies structure to JavaScript-heavy applications by providing models with key-value binding and custom events, collections with a rich API of enumerable functions, views with declarative event handling, and connects it all to your existing application over a RESTful JSON interface.

Modernizr is an open-source JavaScript library that helps you build the next generation of HTML5 and CSS3-powered websites.

Dapper - a simple object mapper for .NetOfficial Github clone: https://github.com/SamSaffron/dapper-dot-net FeaturesDapper is a single file you can drop in to your project that will extend your IDbConnection interface. It provides 3 helpers: Execute a query and map the results to a strongly typed Listpublic static IEnumerable Query(this IDbConnection cnn, string sql, object param = null, SqlTransaction transaction = null, bool buffered = true)

This component framework looks amazing for recreating a Windows Desktop user experience in web sites. Just have a look at the demos.