Photoshop
Some basic tutorials for Photoshop beginners
One(of many )way to selectively desaturate....includes 'crop','resize' and 'save for web'
Artistic layers and adding a text layer here
creating a duotone an image composed of two colors. A duotone image can be used on a Web page to economize on file size as well as to give the image an artistic, retro look. A duotone is created by overlaying a color (such as blue or red) on a grayscale image.
some free photo shop learning videos