>1.  Syntax highlighting

See http://minnow.cc.gatech.edu/squeak.390  There you find the
SH-Package adapted 
to Version 2.x

2.  Function plotter

Function-Plotter is part of the Math-Morph project.
http://www.dm.uba.ar/MathMorphs/
It has nothing to do woth the Mandelbrot Morph.

3.  Whisker

See http://home.munich.netsurf.de/Helge.Horch/SqueakSharesSoar.html