GoogleCalculator - Do math or convert units. Just search for "2+3", "square root of pi" or "4 hectares in square fathoms"
One of their mottos is "Don't Be Evil", although many still think GoogleIsEvil.
Google has attracted all sorts of talent in the industry, such as RobPike and KenThompson.
Google has also sponsored all sorts of things outside their core interests.
Google Summer of Code - educational program for exposing undergraduates to the OpenSource community