This is pomodoro-applet, a GNOME and MATE Panel applet implementing a simple
timer for the Pomodoro Technique (http://www.pomodorotechnique.com/). You
will need the development files for libnotify, libcanberra-gtk, librsvg, and
either libgnome-panel, libpanel-applet or libmate-panel-applet to build this.
The main author is John Stumpo <projects at stump dot io>.
Releases are at:
  http://ftp.stump.io/software/pomodoro-applet/
There is a mailing list for discussion, patches, and announcements at:
  https://stump.io/mailman/listinfo/pomodoro-applet
timerexpired.ogg was generated with:
  $ sox '|sox -n -p trim 0.0 0.4' \
        '|sox -n -p synth tri 4500 fade 0.005 0.2' \
        '|sox -n -p trim 0.0 0.08' \
        '|sox -n -p synth tri 4500 fade 0.005 0.2' \
        '|sox -n -p trim 0.0 0.4' \
            timerexpired.ogg vol 0.5 repeat 1
pomodoro.svg was obtained from:
  http://jaanos.deviantart.com/art/Tomato-quot-Tango-quot-like-icon-94848835
and is under the GNU GPL version 2 or later.