ROX-Filer is in Debian/stable. To install:
# apt-get install rox-filer
Dennis Tomas writes that he has
"put together a package "rox-desktop" containing nothing but some (IMHO) good defaults, 0install-wrappers for some core software and a login-script. [...] I've also made a menu-method for debian, which places app-wrappers for on-rox-apps in /usr/share/rox/Apps/Debian.
It's all available from ftp://ftp.berlios.de/pub/rox4debian.
You can also add it to your /etc/apt/sources.list:
deb ftp://ftp.berlios.de/pub/rox4debian binary/
Then update APT's cache with:
# apt-get update
There is also a (separate and less active) ROX-in-Debian Project at http://alioth.debian.org/projects/pkg-rox/.
After installing, you might like to read the Getting Started Guide.
Existing (non-ROX) applications are available from /usr/share/applications.
You can install gtk themes w/ apt too.
apt-cache search gtk-engines apt-cache search gtk2-engines
Then just select a theme from the GTk theme switcher or by runing ROX-session>SessionSetting>Display