Paint.net Portable is a free image-editing program that supports layers, special effects, and other tools. It’s highly useful for both the newbie graphic designer and the professional. I started out with this program because it’s free, but I’ve come to rely on it regularly for work. I really appreciate Paint.net Portable’s active online community that helps with troubleshooting problems and offering advice about how best to use the tools. I’ve used Paint.net Portable to design websites, create mockups for clients, and increase my productivity. This program will be useful to anyone involved with creative digital projects.
A worthy alternative to Photoshop
Sketch Effect PRO
Sketch Effect PRO turns an ordinary photo or image into a freehand sketch, imitating pencil, pen, brush and other textures
Xara Photo & Graphic Designer
Full featured photo editing and graphic design tool
A professional desktop design software