Here you can discuss the 100% FREE Paint.NET, a photo editing tool based off of Microsoft's Paint for Windows; it has been compared to high-grade high-price software such as Adobe's Photoshop and Corel's Paint Shop Pro.
You can find Paint.NET at...
www.getpaint.netI recommend downloading the install from Download.com (I trust Download.com, and I've never used any of the other options)
I have some experience with Paint.NET, and I can tell you some of the features it has!
-You can make transparencies, so the background of an image blends in with the color behind the image on the page; this is good for making circles without a big white outside to it.
-You can customize and save palettes
-You can apply filters and effects like some in Adobe's Photoshop
-There are advanced tools to select round areas; not just a square
-And much more!
There is a support forum for PDN, which can be found here:
Forum