xdemorse 1.3-6ubuntu1 (amd64 binary) in ubuntu raring

 xdemorse is a GTK+ graphical version of demorse, using the same decoding
 engine. It has an FFT-derived "waterfall" display of the incoming audio
 signal's spectrum, as well as a 'scope-like display of the audio
 detector's output and status of the mark/space discriminator ("slicer").
 xdemorse also has CAT for the FT-847 and this can be used to net the
 receiver's frequency to the incoming signal, by clicking near its trace
 in the waterfall display.