JayData
JayData is a unified data access library for JavaScript to CRUD data from different sources like WebSQL/SQLite, IndexedDB, MongoDb, ASP.NET WebAPI, OData, HTML5 localStorage, Facebook or YQL. The library can be integrated with KendoUI, Knockout.js, Handlebars.js or Sencha Touch 2 and can be used on Node.js as well.
Conditioner
Frizz Free, Environment-aware, JavaScript Modules
Eve.js
A <3kb JavaScript file providing three simple methods to organize code into CSS namespaces which magically restrict code to the current context, allowing for dramatic reductions to code size and development time.
Abaaso
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Angular Meteor
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Theory
Abstraction layer for cross platform JavaScript.
Sproutcore
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Hasher
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Canjs
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Axios
Promise based HTTP client for the browser and node.js
Wee
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Path.js
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Lodash
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Queue
Yet another asynchronous helper library for JavaScript. 387 bytes minified and gzipped!
Kefir
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Simplate
A simple, but powerful, templating engine for JavaScript.