getsetdeep
Get and set nested variables of an object, includes support for Backbone Models
sails-backbone
Generate client-side Backbone.js Models from a Sails.js API. Uses Backbone Relational to generate relations, and Backbone Validator to generate validation functions.
backbone-nesty
Support nested data types like collections and models within your Backbone.js models
skull.io
Real-time web apps with Backbone.js and Socket.io