source-code search engines

Links to source-code search engines 

http://www.google.com/codesearch

http://www.krugle.org/

http://www.bytemycode.com/

http://snippets.dzone.com/

http://www.codase.com/

http://labs.oreilly.com/code/

http://opensource.ankerl.com/

http://snipplr.com/

http://www.merobase.com/

http://www.codefetch.com/