SemanticKO is a JavaScript library for building complex JavaScript applications in a declarative way on top of a RDF data layer. The library is open source and can be downloaded from github.
SemanticKO extends KnockoutJS, a JavaScript library for building applications using the Model View ViewModel (MVVM) architectural pattern. It also uses RDFStore-JS, a pure JavaScript implementation of a RDF store, as the foundation for the library data layer.
A detailed description of the library can be found here.