HAL: www.freedesktop.org/Software/hal
D-BUS: www.freedesktop.org/Software/dbus
udev: www.kernel.org/pub/linux/utils/kernel/hotplug/udev.html
GNOME Volume Manager: ftp.gnome.org/pub/gnome/sources/gnome-volume-manager
NetworkManager: people.redhat.com/dcbw/NetworkManager