QualityBots
A tool for automated comparison of website layouts across multiple Chrome versions.
http://code.google.com/p/qualitybots/

Test Analytics
Test Analytics is a web application that allows rapid generation of a project’s ACC model — an alterative to a test plan that is faster to create and of more practical value.
http://code.google.com/p/test-analytics/

Script Cover
Javascript code coverage detector for web pages in Chrome
http://code.google.com/p/script-cover/

Google Tasks Porter
http://code.google.com/p/google-tasks-porter/
Demo https://google-tasks-porter.appspot.com/

Google APIs Client Library for Objective-C
http://code.google.com/p/google-api-objectivec-client/

Bootstrap
Bootstrap is a toolkit from Twitter designed to kickstart development of webapps and sites.
It includes base CSS and HTML for typography, forms, buttons, tables, grids, navigation, and more.
http://twitter.github.com/bootstrap/

heatmap.js
JavaScript Library for HTML5 canvas based heatmaps
http://www.patrick-wied.at/static/heatmapjs/

Google JS Test
Google JS Test is a fast javascript unit testing framework that runs on the V8 engine, without needing to launch a full browser.
http://code.google.com/p/google-js-test/