Since scripting in RWPaint is getting more and more popular, I have spent some time improving it today. The change is not big, but I hope you'll find it useful when it is released (probably in 2014).
Which RealWorld software is the most popular one? If you guessed RealWorld Cursor Editor, you guessed right. RealWorld Paint takes the second place. Both of them are free and so it is no surprise that they are more popular than the paid ones. Here are two graphs that may be interesting and will get more interesting in the future.