For details of other C++ matrix libraries look at http://webnz.com/robert/cpp_site.html or http://webnz.co.nz/robert/cpp_site.html or download the text file ftp://webnz.com/robert/cpp_site.txt or ftp://webnz.co.nz/robert/cpp_site.txt . Look at the section lists of libraries which gives the locations of several very comprehensive lists of matrix and other C++ libraries and at the section source code.