diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..1521c8b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+dist
diff --git a/.npmignore b/.npmignore
new file mode 100644
index 0000000..5d69da3
--- /dev/null
+++ b/.npmignore
@@ -0,0 +1,3 @@
+.idea
+*.iml
+*.xml
diff --git a/build.js b/build.js
new file mode 100644
index 0000000..9165250
--- /dev/null
+++ b/build.js
@@ -0,0 +1,16 @@
+"use strict";
+
+var UglifyJS = require('uglify-js'),
+    fs = require('fs'),
+    pkgInfo = require('./package.json'),
+    sourceFile = __dirname + '/lib/' + pkgInfo.main.replace('dist/', ''),
+    targetFile = __dirname + '/' + pkgInfo.main,
+    targetMinFile = __dirname + '/' + pkgInfo.main.replace(/.js$/, '') + '.min.js',
+    source = fs.readFileSync(sourceFile);
+
+if (!fs.existsSync('./dist')) {
+    fs.mkdirSync('./dist');
+}
+
+fs.writeFileSync(targetFile, source);
+fs.writeFileSync(targetMinFile, UglifyJS.minify(targetFile).code);
\ No newline at end of file
diff --git a/data/madge-express.json b/data/madge-express.json
new file mode 100644
index 0000000..a887306
--- /dev/null
+++ b/data/madge-express.json
@@ -0,0 +1 @@
+{"benchmarks/middleware":["http","index"],"index":["lib/express"],"lib/application":["debug","escape-html","http","lib/middleware/init","lib/middleware/query","lib/router/index","lib/utils","lib/view","methods","utils-merge"],"lib/express":["events","lib/application","lib/middleware/query","lib/request","lib/response","lib/router/index","lib/router/route","serve-static","utils-merge"],"lib/middleware/init":[],"lib/middleware/query":["parseurl","qs"],"lib/request":["accepts","fresh","http","parseurl","proxy-addr","range-parser","type-is"],"lib/response":["cookie","cookie-signature","escape-html","http","lib/utils","path","send","utils-merge"],"lib/router/index":["debug","lib/router/layer","lib/router/route","methods","parseurl"],"lib/router/layer":["debug","path-to-regexp"],"lib/router/route":["debug","lib/utils","methods"],"lib/utils":["buffer-crc32","path","proxy-addr","send","util"],"lib/view":["fs","lib/utils","path"],"support/app":["index"]}
diff --git a/index.html b/index.html
index 4bf1bf5..e376586 100644
--- a/index.html
+++ b/index.html
@@ -21,7 +21,7 @@
   margin: 1em 0;
 }
 
-#chart_placeholder {
+#chart_placeholder, #express_chart {
   text-align: center;
   margin-bottom: 20px;
 }
@@ -101,6 +101,11 @@ <h2>Usage</h2>
 
     <h2>Sharing your DependencyWheels</h2>
     <p>The best way to share your DependencyWheels is to use <a href="http://pages.github.com/">GitHub Pages</a>, just like this very page. So just fork the <a href="https://github.com/fzaninotto/DependencyWheel">fzaninotto/DependencyWheel</a> repository, add your own JSON data under the <code>data/</code> directory, commit the code, and push to the <code>gh-pages</code> branch. GitHub will publish the result for you.</p>
+
+    <h2>Example Using Madge Tree Output from express.js</h2>
+
+    <div id="express_chart"></div>
+
     <h2>Licence</h2>
     <p>All this work is open-source, published by <a href="https://twitter.com/francoisz">François Zaninotto</a> under the MIT license. Sponsored by <a href="http://marmelab.com">marmelab</a>.</p>
 
@@ -115,9 +120,10 @@ <h2>Licence</h2>
     </div>
   </div>
   <a href="https://github.com/fzaninotto/DependencyWheel"><img style="position: absolute; top: 0; right: 0; border: 0;" src="https://s3.amazonaws.com/github/ribbons/forkme_right_orange_ff7600.png" alt="Fork me on GitHub"></a>
-  <script src="js/d3.min.js"></script>
-  <script src="js/d3.dependencyWheel.js"></script>
-  <script src="js/composerBuilder.js"></script>
+  <script src="//cdnjs.cloudflare.com/ajax/libs/d3/3.4.8/d3.min.js"></script>
+  <script src="lib/d3.dependencyWheel.js"></script>
+  <script src="lib/composerBuilder.js"></script>
+  <script src="lib/madgeBuilder.js"></script>
   <script>
   var gitHubApiUrl = 'https://api.github.com/repos/';
   var getData = function(target, callback) {
@@ -142,6 +148,13 @@ <h2>Licence</h2>
 
   var chart = d3.chart.dependencyWheel();
 
+  d3.json('data/madge-express.json', function(madgejson) {
+      var data = buildMatrixFromMadge(madgejson);
+      d3.select('#express_chart')
+              .datum(data)
+              .call(chart);
+  });
+
   d3.json('data/composer.json', function(composerjson) {
     d3.json('data/composer.lock', function(composerlock) {
       var data = buildMatrixFromComposerJsonAndLock(composerjson, composerlock);
diff --git a/js/d3.min.js b/js/d3.min.js
deleted file mode 100644
index 331756a..0000000
--- a/js/d3.min.js
+++ /dev/null
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diff --git a/js/composerBuilder.js b/lib/composerBuilder.js
similarity index 73%
rename from js/composerBuilder.js
rename to lib/composerBuilder.js
index 1f2b32c..7335dcc 100644
--- a/js/composerBuilder.js
+++ b/lib/composerBuilder.js
@@ -1,3 +1,17 @@
+(function(root, factory) {
+  if(typeof define === 'function' && define.amd) {
+    define([], factory);
+  } else if(typeof exports === 'object') {
+    module.exports = factory();
+  } else {
+    var ret = factory(root);
+    root.buildMatrixFromComposerJson = ret.buildMatrixFromComposerJson;
+    root.buildMatrixFromComposerJsonAndLock = ret.buildMatrixFromComposerJsonAndLock;
+  }
+}(this, function() {
+
+"use strict";
+
 var buildMatrixFromComposerJson = function(composerjson) {
   var n = Object.keys(composerjson.require).length;
   var matrix = [];
@@ -12,7 +26,7 @@ var buildMatrixFromComposerJson = function(composerjson) {
   }
   var packageNames = Object.keys(composerjson.require);
   packageNames.unshift(composerjson.name);
-  
+
   return {
     matrix: matrix,
     packageNames: packageNames
@@ -34,14 +48,14 @@ var buildMatrixFromComposerJsonAndLock = function(composerjson, composerlock) {
   // List the replacements
   packages.forEach(function(p) {
     if (!p.replace) return;
-    for (replaced in p.replace) {
+    for (var replaced in p.replace) {
       replaces[replaced] = p.name;
     }
   });
-  
+
   // update required packages with replacements
   packages.forEach(function(p) {
-    for (packageName in p.require) {
+    for (var packageName in p.require) {
       if (packageName in replaces) {
         p.require[replaces[packageName]] = p.require[packageName];
         delete p.require[packageName];
@@ -51,7 +65,7 @@ var buildMatrixFromComposerJsonAndLock = function(composerjson, composerlock) {
 
   // Compute a unique index for each package name.
   packages.forEach(function(p) {
-    packageName = p.name;
+    var packageName = p.name;
     if (!(packageName in indexByName)) {
       packageNames[n] = packageName;
       indexByName[packageName] = n++;
@@ -66,8 +80,8 @@ var buildMatrixFromComposerJsonAndLock = function(composerjson, composerlock) {
      row = matrix[source] = [];
      for (var i = -1; ++i < n;) row[i] = 0;
     }
-    for (packageName in p.require) {
-      row[indexByName[packageName]]++; 
+    for (var packageName in p.require) {
+      row[indexByName[packageName]]++;
     }
   });
 
@@ -88,3 +102,12 @@ var buildMatrixFromComposerJsonAndLock = function(composerjson, composerlock) {
     packageNames: packageNames
   }
 };
+
+
+  return {
+    buildMatrixFromComposerJson: buildMatrixFromComposerJson,
+    buildMatrixFromComposerJsonAndLock: buildMatrixFromComposerJsonAndLock
+  }
+
+
+}));
\ No newline at end of file
diff --git a/js/d3.dependencyWheel.js b/lib/d3.dependencyWheel.js
similarity index 91%
rename from js/d3.dependencyWheel.js
rename to lib/d3.dependencyWheel.js
index 8a7286d..ecfd66c 100644
--- a/js/d3.dependencyWheel.js
+++ b/lib/d3.dependencyWheel.js
@@ -1,3 +1,17 @@
+// Uses modified umd returnExports pattern:
+// https://github.com/umdjs/umd/blob/master/returnExports.js
+(function (root, factory) {
+  if (typeof define === 'function' && define.amd) {
+        define(['d3'], factory);
+      } else if (typeof exports === 'object') {
+        module.exports = factory(require('d3'));
+      } else {
+        factory(root.d3);
+      }
+}(this, function (d3) {
+
+    "use strict";
+
 d3.chart = d3.chart || {};
 
 /**
@@ -66,7 +80,7 @@ d3.chart.dependencyWheel = function(options) {
 
       var fill = function(d) {
         if (d.index === 0) return '#ccc';
-        return "hsl(" + parseInt(((packageNames[d.index][0].charCodeAt() - 97) / 26) * 360, 10) + ",90%,70%)";
+        return "hsl(" + parseInt(((packageNames[d.index][0].charCodeAt(0) - 97) / 26) * 360, 10) + ",90%,70%)";
       };
 
       // Returns an event handler for fading a given chord group.
@@ -167,3 +181,6 @@ d3.chart.dependencyWheel = function(options) {
 
   return chart;
 };
+
+return d3;
+}));
\ No newline at end of file
diff --git a/lib/madgeBuilder.js b/lib/madgeBuilder.js
new file mode 100644
index 0000000..428cd40
--- /dev/null
+++ b/lib/madgeBuilder.js
@@ -0,0 +1,43 @@
+(function(root, factory) {
+    if(typeof define === 'function' && define.amd) {
+        define([], factory);
+    } else if(typeof exports === 'object') {
+        module.exports = factory();
+    } else {
+        root.buildMatrixFromMadge = factory();
+    }
+}(this, function() {
+
+    "use strict";
+
+    var buildMatrixFromMadge = function(madgeTree) {
+
+        var packageNames = [], matrix = [], i = 0, mapModIdx = {};
+
+        //populate packagenames
+        for(var module in madgeTree) {
+            packageNames.push(module);
+            mapModIdx[module] = i;
+            i++;
+        }
+
+        for(var module in madgeTree) {
+            var deps = madgeTree[module],
+                matrixRow = Array.apply(null, new Array(packageNames.length)).map(Number.prototype.valueOf, 0);
+
+            deps.forEach(function(mod) {
+                matrixRow[mapModIdx[mod]] = 1;
+            });
+
+            matrix.push(matrixRow);
+        }
+
+        return {
+            packageNames: packageNames,
+            matrix: matrix
+        }
+    };
+
+    return buildMatrixFromMadge;
+
+}));
\ No newline at end of file
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..d464e75
--- /dev/null
+++ b/package.json
@@ -0,0 +1,42 @@
+{
+  "name": "dependency-wheel",
+  "version": "0.1.0",
+  "description": "A package dependency visualization using d3.js. Currently supports Composer for PHP and Madge for AMD/CommonJS.",
+  "main": "dist/d3.dependencyWheel.js",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/fzaninotto/DependencyWheel.git"
+  },
+  "scripts": {
+    "prepublish": "node build.js"
+  },
+  "keywords": [
+    "D3",
+    "Graph",
+    "Package",
+    "Dependency",
+    "Composer",
+    "PHP"
+  ],
+  "author": "François Zaninotto",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/fzaninotto/DependencyWheel/issues"
+  },
+  "homepage": "https://github.com/fzaninotto/DependencyWheel",
+  "devDependencies": {
+    "uglify-js": "^2.4.13"
+  },
+  "npmName": "dependency-wheel",
+  "npmFileMap": [
+    {
+      "basePath": "/dist/",
+      "files": [
+        "*.js"
+      ]
+    }
+  ],
+  "dependencies": {
+    "d3": "^3.4.8"
+  }
+}
diff --git a/test/createExpressMadge.js b/test/createExpressMadge.js
new file mode 100644
index 0000000..5b7f1d5
--- /dev/null
+++ b/test/createExpressMadge.js
@@ -0,0 +1,5 @@
+var madge = require('madge');
+
+var dependencies = madge('./express-master/', {exclude: '^examples*|^test*'}).tree;
+
+console.log(JSON.stringify(dependencies));
\ No newline at end of file