You don't need CandyBar for icons. Just download the icons you want and copy/paste. (SOME things need CandyBar to be changed, like toolbar icons, but not folder icons)
Looks like most of the icons in that screenshot are from the
Micro icon set.
Other than that, in the screenshot it looks like UNO is installed (like
dr_lha said) and the Finder window background color has been changed (go to View Options in the Finder to change it — only works in Icon View).