This is a pretty interesting and comprehensive list of products that Google killed off. The company has always hedged their bets by creating redundancies (think messaging) and dabbled in "the next big thing" (Wave, Buzz, etc... ) but it's surprising to see how many seemingly successful entities they've killed off. My favorite discontinued product was easily Google Reader. Not sure why they killed it completely instead of trying transition the content and users into a more social environment like Google Plus. Seems like it was a complete waste to me and I still miss the days of following news through Google Reader via RSS. Somehow Feedly never fulfilled that appetite, perhaps because of the changing nature of digital news. Maybe Google saw that coming. What was your favorite discontinued Google product, service, or app?