Smoothglass is a preset for QTCurve and cross-desktop theme style that works for both GNOME and KDE, and a lighter, more modern look based on my previous work on Oxymentary Theme.
It includes both the QTCurve settings file as well as the KDE color scheme which can be imported via KDE's System Settings/Appearance applet.
PLEASE NOTE: This is not a 'window decoration' theme, I am using a custom emerald-decorator to render the window titlebars. This QTCurve theme will style all of your other interface elements like tabs, buttons, etc.
To use this theme:
1) Make sure QTCurve is installed for all desktop environments you want to use this theme on.
2) Run "systemsettings" (the KDE System Settings tool) and go into "Appearance". Set the theme as QTCurve.
3) Configure QTCurve here, click on "Import" from the QTCurve settings applet and select the oxymentary-theme.qtcurve file you downloaded.
4) You're done! If you're also using a GNOME2 desktop, also run gnome-appearance-properties, select 'customize' and set QTCurve as your selected controls style.