What linux distribution is good?

Dear all
i am new to Linux, i need a Linux OS that have been "qt development and lesstif" together.

Regards

I'm not quite sure what you're asking. If you know what they are I'm sure you could get the programs you wanted on many distributions.

IMO, almost all distributions are good, it mostly depends on what you need. And the development files for Qt and LessTif are installable on every distribution I've seen so far.

my 1st distro is fedora 13 the new fedora 15 really impress me

I have tried most of the major ones and really love Arch but I am using Scientific Linux at the moment and it is performing well.

I would say that OpenSUSE is a good compromise between being very powerful, relatively intuitive as well as user friendly