We saw this cute cat on www.twango.com/channel/Agrodolce.pets so my mom and I used Paint.NET to put cool eyes on it. I learned how to make eyes from the Paint.NET tutorial.
Paint.NET is a free image and photo manipulation software that is open source too! Paint.NET is written in .NET 2.0 and mostly is c# and has a small amount of C++. It supports layers, unlimited history, a simple and intuitive interface, and is loaded with special effects. Tons of great tutorials are available to teach you how to create amazing affects at paintdotnet.12.forumer.com/viewforum.php?f=15
Get it: GetPaint.NET www.getpaint.net/
Code it: Paint.NET has a managed API that you can write plug-ins for using any managed language as shown in this Code Project tutorial by Dennis Dietrich www.codeproject.com/csharp/PdnNoiseEffect.asp