i4lib, a C code which contains many utility routines for "I4" or single precision integer arithmetic.
The information on this web page is distributed under the MIT license.
i4lib 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.
c8lib, a C code which implements certain elementary functions for "C8" or double precision complex variables;
i8lib, a C code which contains many utility routines, using "I8" or "double precision integer" arithmetic.
r4lib, a C code which contains many utility routines, using "R4" or "single precision real" arithmetic.
r8lib, a C code which contains many utility routines, using "R8" or "double precision real" arithmetic.