1. BLAS: Basic Linear Algebra Subprograms.
http://www.netlib.org/blas
2. Engineering and Scientific Subroutine Library (ESSL) and Parallel ESSL.
http://www-03.ibm.com/systems/power/software/essl/
3. Intel MKL Library.
http://software.intel.com/en-us/articles/intel-mkl
4. NVIDIA CUDA Toolkit.
http://developer.nvidia.com/cuda-toolkit
5. The NVIDIA CUDA Basic Linear Algebra Subroutines (CUBLAS).
http://developer.nvidia.com/cublas