R. Tyler Ballance wrote Bonsoir during an all night coding marathon before BarCamp, which is a sort of 'unconference' for developers and their ilk. So what the heck does Bonsoir do? Thanks to the magic of Bonjour it allows people to share their vCards with each other, on a local network, with the smallest of effort.

Bonsoir has been released under a special BarCamp license.
This article was originally published on Tuaw.