The "Raindrops" plugin can be
http://www.redfieldplugins.com/filterWaterRipples.htm (Freeware)
or
http://www.redfieldplugins.com/filterRipplesMagic.htm (Shareware)
there is a plugin set called (Visman) VM Experimental
that has 2 plugins called "Painting by numbers" and "Every picture tells a story"
Every picture tells a story
Painting by numbers
By the way.
I used "Painting by Numbers" filter on this image
http://www.deviantart.com/view/4446612/
/Hubbabub