libnotify: libnotify (Galago Desktop Notification Library)
libnotify:
libnotify: libnotify is a part of a desktop presence framework, designed to 
libnotify: transmit presence information between programs. To put it in simpler 
libnotify: terms, it takes information on who is online and their away/idle states 
libnotify: from an instant messenger (such as gaim) or other similar programs and 
libnotify: lets other programs (such as Ximian's Evolution) to make use of it.
libnotify: 
libnotify: The advantage of such a framework is that it brings your programs closer 
libnotify: together. When you receive an e-mail from a friend who is in your buddy 
libnotify: list, you'll be able to immediately tell their online status, for example.