CoolCap is a great tool for creators of desktop themes, help files or programs.
CoolCap is a MDI Picture viewer using
a thumbnail gallery to browse for images.
CoolCap provides basic image editing functions alternatively it allows to edit your image in MS Paint.
CoolCap provides multiple ways to create screen shoots, a feature even to save selction rectangle to repeat the shoot at same postion.
By converting those images into high color icons you can archive the basic elements of your Desktop Themes in no time.