dbus-1-dbg 1.8.12-1ubuntu5 (amd64 binary) in ubuntu vivid

 D-Bus is a message bus, used for sending messages between applications.
 Conceptually, it fits somewhere in between raw sockets and CORBA in
 terms of complexity.
 .
 This package provides support for debugging programs that use the core
 D-Bus shared library.
 .
 See the dbus package description for more information about D-Bus in general.