Well, like the title says...I found something!
its called "Paint.Net" Literally...
you can download extra effects online on its forums.
I got it yesterday and I have been playing around with it and its fun!
if you want to go download it here's the link
The site so you can read about it and decide if you want to download it.
www.getpaint.net
If you want to get the extra effects (like a water effect!)
http://paintdotnet.12.forumer.com/index.php