Slackware Packages
Tux Paint for Slackware Linux is available as two packages, maintained in the unofficial SlackBuilds.org repository.One contains the main program (Tux Paint). The other contains the optional 'stamps' collection.If you need "Tux Paint Config.", the optional configuration GUI, you can download the source code for it.
Tux Paint
tuxpaint
https://slackbuilds.org/repository/14.2/graphics/tuxpaint/
Version: 0.9.23 for Slackware (2018.09.01)
From: Tim Dickson
Rubber Stamps package
tuxpaint-stamps
https://slackbuilds.org/repository/14.2/graphics/tuxpaint-stamps/
Version: 2018.09.01
From: Tim Dickson
Did you know? Tux Paint is not shareware, it's open source. So it's free, forever!