I found a nice looking tool called
KGraphSpace and tried to install it. All goes okay until I hit ./configure && make && make install and after some churning the thing ends with:
checking for Qt....configure: error : Qt (>= Qt 3.0.2) (library qt-mt) not found. Please check your installation!
So I got some advice to do ./configure -enable-multithread=yes (and also tried no) but ends with same error. RPMFIND.NET is not forthcoming at the moment so I wonder if anyone else hit the same thing and got onwards. RHL 7.2.
Stig