test_eigen, a Fortran77 code which generates eigenvalue test.
The current version of the code can only generate a symmetric or nonsymmetric matrix of arbitrary size, with eigenvalues distributed according to a normal distribution whose mean and standard deviation are specified by the user (subroutines R8SYMM_GEN and R8NSYMM_GEN).
The computer code and data files described and made available on this web page are distributed under the MIT license
test_eigen 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.
eispack, a Fortran77 library which can compute eigenvalues and eigenvectors.
EXPOKIT, a Fortran77 library which solves various forms of the matrix exponential problem, by Roger Sidje.
JACOBI_EIGENVALUE, a Fortran77library which implements the Jacobi iteration for the iterative determination of the eigenvalues and eigenvectors of a real symmetric matrix.
TEST_MAT, a Fortran77 library which defines a number of matrices with known properties. Examples with known eigenvalues and eigenvectors are included.