asa005, a FORTRAN77 code which evaluates the lower tail of the noncentral T distribution, by BE Cooper.
This is Applied Statistics Algorithm 5.
The computer code and data files described and made available on this web page are distributed under the MIT license
asa005 is available in a C version and a C++ version and a Fortran90 version and a MATLAB version and an Octave version and a Python version.
ASA076, a FORTRAN77 library which evaluates the Owen's T function, needed to compute the CDF of the noncentral T distribution.
ASA243, a FORTRAN77 library which evaluates the CDF of the noncentral T distribution.
OWEN, a FORTRAN77 library which evaluates Owen's T function.
Original FORTRAN77 version by BE Cooper; This version by John Burkardt.