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+<a href="http://promises-aplus.github.com/promises-spec"><img src="http://promises-aplus.github.com/promises-spec/assets/logo-small.png" alt="Promises/A+ logo" align="right" /></a>
+
+[![Build Status](https://travis-ci.org/cujojs/when.svg?branch=master)](https://travis-ci.org/cujojs/when)
+[![Inline docs](http://inch-ci.org/github/cujojs/when.svg?branch=master)](http://inch-ci.org/github/cujojs/when)
+
+when.js
+=======
+
+When.js is a rock solid, battle-tested [Promises/A+](http://promises-aplus.github.com/promises-spec) and `when()` implementation, including a complete [ES6 Promise shim](docs/es6-promise-shim.md).  It's a powerful combination of small size, high performance, debuggability, and rich features:
+
+* Resolve arrays and hashes of promises, as well as infinite promise sequences
+* Execute tasks in parallel or sequentially
+* Transform Node-style and other callback-based APIs into promise-based APIs
+
+When.js is one of the many stand-alone components of [cujoJS](http://cujojs.com), the JavaScript Architectural Toolkit. 
+
+Check it out:
+
+- [What's new](CHANGES.md)
+- [API docs](docs/api.md#api)
+- Read more about how [promises simplify async programming](http://know.cujojs.com/tutorials/async/simplifying-async-with-promises)
+
+Installation
+------------
+
+#### AMD
+
+Available as `when` through [bower](http://bower.io), or just clone the repo and load `when.js` from the root.
+
+```
+bower install --save when
+```
+
+#### CommonJS/Node
+
+```
+npm install --save when
+```
+
+[More help & other environments &raquo;](docs/installation.md)
+
+Usage
+-----
+
+Promises can be used to help manage complex and/or nested callback flows in a simple manner. To get a better handle on how promise flows look and how they can be helpful, there are a couple examples below (using commonjs).
+
+This first example will print `"hello world!!!!"` if all went well, or `"drat!"` if there was a problem. It also uses [rest](https://github.com/cujojs/rest) to make an ajax request to a (fictional) external service.
+
+```js
+var rest = require('rest');
+
+fetchRemoteGreeting()
+    .then(addExclamation)
+    .catch(handleError)
+    .done(function(greeting) {
+        console.log(greeting);
+    });
+
+function fetchRemoteGreeting() {
+    // returns a when.js promise for 'hello world'
+    return rest('http://example.com/greeting');
+}
+
+function addExclamation(greeting) {
+    return greeting + '!!!!'
+}
+
+function handleError(e) {
+    return 'drat!';
+}
+```
+
+The second example shows off the power that comes with when's promise logic. Here, we get an array of numbers from a remote source and reduce them. The example will print `150` if all went well, and if there was a problem will print a full stack trace.
+
+```js
+var when = require('when');
+var rest = require('rest');
+
+when.reduce(when.map(getRemoteNumberList(), times10), sum)
+    .done(function(result) {
+        console.log(result);
+    });
+
+function getRemoteNumberList() {
+    // Get a remote array [1, 2, 3, 4, 5]
+    return rest('http://example.com/numbers').then(JSON.parse);
+}
+
+function sum(x, y) { return x + y; }
+function times10(x) {return x * 10; }
+```
+
+License
+-------
+
+Licensed under MIT. [Full license here &raquo;](LICENSE.txt)
+
+Contributing
+------------
+
+Please see the [contributing guide](CONTRIBUTING.md) for more information on running tests, opening issues, and contributing code to the project.
+
+References
+----------
+
+Much of this code was inspired by the async innards of [wire.js](https://github.com/cujojs/wire), and has been influenced by the great work in [Q](https://github.com/kriskowal/q), [Dojo's Deferred](https://github.com/dojo/dojo), and [uber.js](https://github.com/phiggins42/uber.js).