Google has closed down quite a few of their projects over the past year as they consolidated offerings and integrated stand-alone services into Google+ and other apps. The latest wave came yesterday as they announced on their blog that they are shutting down five more projects and open-sourcing a sixth.
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The projects being cut are Google Message Continuity, Needlebase, Picnik, Social Graph API and Urchin.
Google Sky Map is being open-sourced and further development will eventually come from student projects at Carnegie Mellon University.
Unlike a number of projects that Google has previously axed, I have to admit that I have never used any of these services. I’d be interested to hear from anyone that has.