But Glade does come with all the shared libs it needs, for the OS version it is compiled for, as a ‘ldd glade’ should show. Of course some other applications may need their own versions of the Qt libs, so setting LD_LIBRARY_PATH to point to the glade_linux64_**/lib dir will cause problems for them, but as Glade finds its required libraries using rpath, you don’t need to set that env var for Glade.
In terms of download popularity, CentOS is equal to Ubuntu in numbers. And both are 10x less than the number of Windows 64 bit downloads…