This is boilerplate. It's not terribly exciting.

LICENSE.markdown

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+Copyright (c) 2012, <OWNER>
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+*   Redistributions of source code must retain the above copyright notice, this
+    list of conditions and the following disclaimer.
+
+*   Redistributions in binary form must reproduce the above copyright notice,
+    this list of conditions and the following disclaimer in the documentation
+    and/or other materials provided with the distribution.
+
+*   Neither the name of the <ORGANIZATION> nor the names of its contributors may
+    be used to endorse or promote products derived from this software without
+    specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+

README.markdown

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+Extension Hackathon Boilerplate
+===============================
+
+This is boilerplate for an extension hackathon entry. You should replace this
+text with an actual description of the project you've put together.
+
+Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent ornare ornare
+semper. Praesent at nisi nulla. Sed massa dolor, sollicitudin sit amet
+vestibulum elementum, viverra non mauris. Nam risus elit, eleifend sed malesuada
+sit amet, blandit quis dui. Ut commodo, risus a fringilla viverra, magna purus
+gravida enim, eu porta arcu libero nec risus. Sed et nisl non ante imperdiet
+venenatis a eget lorem. Cras nisi sem, lobortis ac feugiat ut, convallis sit
+amet orci. Cras sed libero nec dui euismod condimentum nec sit amet risus. Fusce
+non purus augue. Aenean id dolor arcu. Integer vel magna mauris, a volutpat
+velit. Cras a erat mattis sapien laoreet tristique. Quisque orci nulla, eleifend
+vitae mattis non, dictum nec tellus. Ut ultrices magna a mi pharetra
+sollicitudin nec in metus.
+
+License
+-------
+
+The license for this extension can be found in the [LICENSE.markdown][4] file.
+
+_Contest entries must be either [BSD][1], [MIT][2], or [Apache2][3] licensed.
+Please adjust the [LICENSE.markdown][4] file to taste._
+
+[1]: http://opensource.org/licenses/BSD-3-Clause
+[2]: http://opensource.org/licenses/mit-license.html
+[3]: http://www.apache.org/licenses/LICENSE-2.0.html
+[4]: https://github.com/mikewest/ExtensionHackathonBoilerplate/blob/master/LICENSE.markdown
+
+Authors
+-------
+
+* Jane Doe: http://example.com/
+* John Doe: http://example.com/

manifest.json

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+{
+  /****************************************************************************
+   *    Meta-information
+   */
+  "name": "[EXTENSION NAME GOES HERE]",
+  "description": "[EXTENSION DESCRIPTION GOES HERE]",
+  "version": "0.1",
+  "manifest_version": 2,
+
+  /****************************************************************************
+   *    Icons
+   */
+  "icons": {
+    "16": "icons/16.png",
+    "19": "icons/19.png",
+    "48": "icons/48.png",
+    "129": "icons/128.png"
+  },
+
+  /****************************************************************************
+   *    Browser Action:
+   *    - http://developer.chrome.com/trunk/extensions/browserAction.html
+   */
+  "browser_action": {
+    "default_icon": "icons/19.png", // optional
+    "default_title": "[POPUP TITLE]",    // optional; shown in tooltip
+    "default_popup": "src/popup.html"    // optional
+  },
+
+  /****************************************************************************
+   *    Event Page:
+   *    - http://developer.chrome.com/trunk/extensions/event_pages.html
+   */
+  "background": {
+    "persistent": false,
+    "scripts": [
+      "src/eventPage.js"
+    ]
+  },
+
+  /****************************************************************************
+   *    Permissions:
+   *    - https://developer.chrome.com/trunk/extensions/manifest.html#permissions
+   */
+  "permissions": [
+    "storage" // https://developer.chrome.com/trunk/extensions/storage.html
+  ]
+}

src/eventPage.js

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+// Copyright 2012, <OWNER>: License details can be found in LICENSE.markdown.
+
+chrome.runtime.onInstalled.addEventListener(function () {
+  // Do any one-time setup here. This listener will be triggered once upon
+  // extension installation, and once each time the extension is upgraded to a
+  // newer version.
+
+  chrome.storage.local.set("INSTALLED", true);
+});
+
+// The rest of this script should contain the inner workings of your extension.
+// If you were interested in doing something when the user activates a tab, for
+// instance, you might include code like the following:
+
+chrome.tabs.onActivated.addListener(function (activeTab) {
+  // Do something amazing with Tab ID `activeTab.tabId`!
+  chrome.tabs.get(activeTab.tabId, function (details) {
+    alert("Tab ID #" + details.id + " is displaying " + details.url + "! Wow!");
+  });
+});

src/popup.css

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+/* Copyright 2012, <OWNER>: License details can be found in LICENSE.markdown. */
+
+html {
+  background: #FFF;
+  padding: 5px;
+}
+
+body {
+  background: #DDD;
+  border-radius: 5px;
+  font: 12px/1.2 Helvetica Neue, Helvetica, Arial, Sans Serif;
+  width: 350px;
+  padding: 10px;
+  margin: 0;
+}
+
+h1 {
+  margin: 0.2em 0;
+}
+
+#clock {
+  font: 14px/1 monospace;
+  font-weight: 700;
+}

src/popup.html

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+<!doctype html>
+<!-- Copyright 2012, <OWNER>: License details can be found in LICENSE.markdown. -->
+<html>
+  <head>
+    <title>Boilerplate Popup!</title>
+    <!--
+      All JavaScript must be loaded via external JS files. For details, see
+      http://developer.chrome.com/trunk/extensions/contentSecurityPolicy.html.
+    -->
+    <script src="/src/popup.js"></script>
+    <link href="/src/popup.css" rel="stylesheet"></link>
+  </head>
+  <body>
+    <h1>Boilerplate popup</h1>
+    <p>
+      This is where some interesting, interactive functionality might live.
+      Right now, it displays the current time. We trust you can do better.
+    </p>
+  </body>
+</html>

src/popup.js

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+// Copyright 2012, <OWNER>: License details can be found in LICENSE.markdown.
+
+function displayTime() {
+  var clock = document.querySelector('#clock');
+  clock.innerText = Date();
+}
+
+function main() {
+  var clock = document.createElement('p');
+  clock.id = "clock";
+  clock.innerText = Date();
+  document.body.appendChild(clock);
+  setInterval(displayTime, 1000);
+}
+
+// Kick things off once the plugin's content loads.
+document.addEventListener("DOMContentLoaded", function () {
+  main();
+});