Sophie

Sophie

distrib > * > cooker > x86_64 > by-pkgid > 3187824d41ff97a7955a2a58a09c124f > files > 9

lib64gtkmm3.0_1-3.4.2-1.x86_64.rpm

This is gtkmm, the C++ API for GTK+. 
See http://www.gtkmm.org/