Fill in details about tkpaint here.
Unfortunately, the primary web page for tkpaint appears to have vanished from the internet.
A version of tkpaint is available if you google though.
more details to come.
If anyone has a version of tkpaint that works with tcl/tk 8.4.5, please drop a note here.
The home page of tkPaint is here: http://mars.netanya.ac.il/~samy/tkpaint.html