There is a new application available for Sparkers: Pinta
What is Pinta?
Pinta is a free, open source program for drawing and image editing. Its goal is to provide users with a simple yet powerful way to draw and manipulate images on Linux, Mac, Windows, and *BSD.
Pinta is a Gtk# clone of Paint.Net 3.0
Installation (Sparky 6 & 7):
sudo apt update
sudo apt install pinta