     <a href="http://www.boost.org/doc/libs/release/libs/units/index.html" target="_top">Boost.Units</a>
          </li>
<li class="listitem">
            <a href="http://software.intel.com/en-us/articles/intel-mkl/" target="_top">Intel
            Math Kernel Library</a> for maximum performance
          </li>
<li class="listitem">
            <a href="https://github.com/ddemidov/vexcl" target="_top">VexCL</a> for OpenCL
          </li>
<li class="listitem">
            <a href="http://www.boost.org/doc/li