This wouldn't be complete without mentioning the enhanced CGA version a lot of Europeans experienced via Amstrad/Schneider PCs in the 80s (they tended to be the cheapest way to get a PC here, back then).

"The Amstrad used an "enhanced" CGA graphic mode, which could display 640x200 pixels with 16 colors (or grayscale)."

http://www.old-computers.com/museum/computer.asp?c=183&st=1

http://www.nostalgianerd.com/amstrad-pc1512

There were probably at least five pieces of software released which supported this mode. :)

The PC1512 came bundled with the GEM windowing system from Digital Research, including a paint program: http://www.reenigne.org/computer/gempaint.gif as well as a fairly state of the art graphical BASIC: http://www.reenigne.org/computer/basic2.gif, https://www.youtube.com/watch?v=dDL8w_Mi49A (video in EGA though).