toms664, a FORTRAN77 code which uses Gauss elimination to solve linear systems involving large banded matrices. Disk storage is used when there is not enough memory for the working data.
The computer code and data files made available on this web page are distributed under the MIT license
toms664 is available in a FORTRAN77 version.
lapack_examples, a FORTRAN77 program which demonstrates the use of the LAPACK linear algebra library.
LINPACK, a FORTRAN77 library which factors and solves systems of linear equations in a variety of formats and arithmetic types.