Flat and soft qtcurve theme.
Made & tested with qtcurve version:
and KDE SC 4.4.4 on Archlinux also should look fine with or without compositing!
compatibility with qtcurve older than this is unknown
wallpaper from wallbase net http://wallbase.net/similar/249501
plasma theme is: Air for netbooks (default air is bit too dark for my taste)
I recommend GrayTone001 color scheme http://kde-look.org/content/show.php?content=126403