If we talk about the program for viewing RAW-files under Windows 7, earlier I would, without doubt, advise you on the infranView with installed plugins . Others would certainly recommend ACDSee .
“Advanced” use LightRoom or Aperture for this - if it’s not about Windows, but about Mac OS. These packages, without a doubt, are necessary for batch processing of images, but for previewing and navigating through your shooting - not so much.
Canon: Digital Rebel XT, Digital Rebel XTi, EOS 10D, EOS 20D, EOS 30D, EOS 40D, EOS 50D Digital, EOS 300D, EOS 350D, EOS 400D, EOS 450D, EOS 500D, EOS 550D, EOS 1000D, EOS 5D, EOS 5D Mark II, EOS 7D Digital, EOS D30, EOS D60, EOS Digital Rebel, Kiss Digital EOS, Kiss Digital EOS, Kiss Digital X, EOS Kiss Digital X, EOS Kiss Digital X, EOS Rebel T1i, EOS Rebel T2i, EOS Rebel XS, EOS Rebel XSi, EOS-1D, EOS-1D Mark II, EOS-1D Mark II N, EOS-1D Mark III, EOS-1D Mark IV, EOS-1Ds, EOS- 1Ds Mark II, EOS-1Ds Mark III, PowerShot G2, PowerShot G3, PowerShot G5, PowerShot G6, PowerShot G9, PowerShot G10, PowerShot G11, PowerShot Pro1, PowerShot SX1 IS
PS: This topic of goodness was published not for karma of self-interest for the sake of, but only in order to work with photos to the respected users of Habra, it became a little bit easier.