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Some of the dead Google Products are –

Google X in 2005

Google Answers in 2006

Video Player in 2007

Web Accelerator in 2008

Google Catalog in 2009

Audio Ads in 2009

Dodgeball in 2009

Jaiku in 2009

Google Wave in 2010

Wiki Search in 2010

Google revenue source # PS: I am sorry to avid Gtricks readers for not posting articles for a long time.Now I will definitely update it weekly. Kindly accept my apologies.