This is source code (Fortran 77) with some fixes of the programs listed in the Appendix of the book Low Speed Aerodynamics by Katz and Plotkin.
You will also find a version in modern Fortran and in Python (soon).
Enjoy.
Reference: Joseph Katz and Allen Plotkin. Low-Speed Aerodynamics. 2nd edition. Cambridge University Press. 2001. https://doi.org/10.1017/CBO9780511810329