Articles pages: (The articles are just for graphic editing software engineer to accumulate knowledge to design better software for the end customers. They are not well-organized.)
Related knowledge of photo editing software:
How to Edit Photos for Free with GIMP
How to Take and Save a Screen Shot on a PC
The Pros and Cons of Photo-Editing Software
Photo Editing Services: An Art To Get Back the Novelty And Vigor of The Pictures
Picnik API Offers Photo Editing Tools for any Website
Photo Editing with PhotoPerfect
Advantages Of Photo Editing Software
Choosing Photo Editing Software
Convert image to pdf with Graphics2PDF
Convert TIFF to PDF by Ultra Tiff2PDF
Pdf Converters - GIMP vs XeTeX