Photoshop for many users is the measure of all things. But worth the cost of a license only if you have really big parts of the functionality offered exploits. On the other hand, is often the free Gimp above, but there are many users do not cope with the surface and the Windows versions are somewhat unstable. But with Paint.NET is just a new version of a small alternative appeared. The installation file is just 3.4 MB in size, but you need also the complete Dot Net 2.0 Framework from Microsoft (approx. 50 MB). The program is very powerful, and even were supposed (but not the help files of funkelnagelneuen version). In addition to layers with an alpha channel, there is even Layer Blend Modes and Curves. more infos at bei www.eecs.wsu.edu
more infos at bei www.eecs.wsu.edu