"The ROX Desktop is a lightweight alternative to GNOME or KDE built around the ROX-Filer file manager. The project's name is an abbreviation of 'RISC OS on X.' The ROX Desktop's performance is reminiscent of IceWM, and it's noticeably faster opening programs than GNOME or KDE. However, its speed comes at the expense of a needlessly redundant default configuration, and some users may balk at some of the assumptions its design makes about how they prefer to work.
The ROX Desktop is not part of most distributions. However, unlike many projects, it maintains not only the usual source code and tarred binaries, but also a large number of packages for major distributions, including Debian, Fedora, Gentoo, Mandriva, Slackware, and openSUSE..."