Using C/C++ from Fortran
Using C/C++ and Fortran together
Fortran and C/C++ Mixed Programming
http://www-zeus.desy.de/~burow/cfortran/
http://www.lrz-muenchen.de/services/compute/vpp/compiler/FundC.html
http://www.nersc.gov/nusers/resources/software/ibm/c_and_f.html
http://wwwasdoc.web.cern.ch/wwwasdoc/f90.html
http://www.amath.washington.edu/~lf/software/CompCPP_F90SciOOP.html