X/Motif running under ubuntu: can I get it??

Can I get X/Motif (development, so that I can compile
and link a program) running under ubuntu linux?
I can only find rpm files for installiation.
packages.ubuntu does list libmotif-dev. Is that from
openmotif? apt-get reports it is not available.

Prior to this I was running under RedHat 7.2 that I bought 5
years ago, but the motherboard died and I went to an
athlon 64 board. I am just trying to get things going again.