toms467, a FORTRAN77 code which implements ACM toms algorithm 467, to transpose the elements of a matrix in place.
The text of many ACM toms algorithms is available online through ACM: http://www.acm.org/pubs/calgo or NETLIB: http://www.netlib.org/toms/index.html.
The computer code and data files described and made available on this web page are distributed under the MIT license
toms467 is available in a FORTRAN77 version.
minpack, a FORTRAN90 library which contains routines which can minimize the absolute value of a function of several variables.
TEST_OPT, a FORTRAN90 library which contains routines defining a number of scalar functions of multiple variables to test minimization routines.