LibUnique is a library for writing single instance applications, that is
applications that are run once and every further call to the same binary
either exits immediately or sends a command to the running instance.

LibUnique can be compiled against various backends, to allow the usage of
different IPC mechanisms depending on the platform.

Project page: http://live.gnome.org/LibUnique
Main repository: git://git.gnome.org/unique

Copyright (C) 2007,2008,2009  Emmanuele Bassi

Part of the API and design is based on GUniqueApp, by Vytautas Liuolia.
The "bacon" backend is based on BaconMessageConnection, by Bastien Nocera.