Redhat 6.0 - rpm manager

[Simon Gendreau]

I just installed RH 6.0 .
I did not install gnome as window manager but only KDE.

Is there any GUI rpm management tool available (maybe already
installed?) or I should install one ?
RH suggest gnorpm but since I have installed KDE only, I think that RH
should have taken care to provide a RPM management tool for every Window
manager provided with RH6.

Other question:
How can I review a list of packages/application/tool that I have been
installed on my machine?

Thanks