Google Code Search

http://www.google.com/codesearch

Google has numerous offerings that cater to Web developers, from nuts-and-bolts tools on Google App Engine to the numerous APIs, or open platforms, it makes available for mixing and mashing. So what could be more fitting than giving them a search engine devoted to finding bits of code hidden all over the Web? The service was created in 2006 and has grown to include domains from Poland, Brazil, China, France, Germany, and elsewhere.