Spoonful of Sugar Festival to help MSF Doctors Without Borders is spread over 6 sims and open through the 30th of September, 2018.
Galleria Kakku long time featured artist Kayly Iali on SOS Shopping 4 sim. Her beautiful real life original paintings are a great investment, and now you can get them for a great cause, too.
Pixivor Allen has gorgeous flower paintings on the same sim. (Website).
I also found JudiLynn India‘s colorful works on SOS Shopping 1.