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This is a social network that lets you have private conversations with multiple people. You can arrange boards for different people to post on, and only those invited to the board can ever see what's going on. Apart from the benefit of keeping private conversations private, you don't spam all your mutual friends/followers on other platforms.
Another App.Net app, but this time, it's free!
Apple's troubles with implementing its own Maps app has just shown how well Google has got its Google Maps and Street View down pat. iOS users will have to wait for the time being, though.