NotifyPigeon-Desktop-java is a simple Java application that listens for notification information on a TCP/IP socket. It expects data in the format sent by NotifyPigeon-android, and is designed to be used together with it. It currently supports displaying notifications through libnotify and recalling notifications that have been dismissed on the Android device. It also requires gnome-java to build. You might want to change the path to gnome-java in compile.sh if it is located somewhere else.
It is still very primitive and only works with data sent over your network in plain text.