There are third-party tools that work with Informix and Unix.
Look at JAM from JYACC. It allows you to make a Motif, character-
mode, or Web interface for Informix on Unix.
Look at the homepage for a demo and info, or send me email.
http://www.jyacc.com
Also, Uniface, Unify, Dynasty and Forte might have Unix versions
for Informix.
Good luck,
Mark McNulty
JYACC Consultant
Note- these views are mine and are not those of JYACC or JP Morgan.