The FLIB library
includes lots of non-numeric code.
Do not confuse FLIB with FLIBS,
by Arjen Markus and Michael Baudin.
FLIBS is another good site for explaining Fortran coding and exhibiting
good examples.
Stuart Norris
keeps lots of links to numerical methods, especially in Fortran.
An electronic source for
quicksort in Fortran 90 will provide all of the source and examples from
Introducing Fortran 90, Chivers and Sleightholme, Springer
Verlag.