Canon’s Digital Photo Professional is a powerful free software application that is primarily utilized for editing and processing Canon RAW files. RAW files allow photographers to apply certain image quality parameters such as: sharpness, contrast, saturation, white balance, color tone, color space, bit-depth, and so on after the image has been captured. For the ultimate control over image quality, beginner and professional photographers alike use RAW files and process them with software like DPP. Remember, though, that DPP has an extensive array of features you can apply to JPEG or even single-layer TIFF images as well.
Digital Photo Professional software is easily integrated into an existing workflow. With the power behind Canon’s exclusive DPP RAW processing software, and your preferred image editing software such as Adobe Photoshop®, superior image quality has never been more attainable.
Learn to use it at Canon Digital Photo Professional website 
... Have you noticed
some how this kind of software are more function then the famous photo editing software
Hmm… Adobe Lightroom is better lo.
Of course, you need to pay for it.
DPP accurately interprets the image you created in camera. Lightroom has a great interface but it interprets the image completely different from what you recorded. DPP is clunkier but in the end you save time over Lightroom