Set of mathematical tools

Math toolkit
Free
Offline
http://loneada.users.sourceforge.net/

Math toolkit is a lightweight C++ and Python library for finance, statistics, and linear algebra. It is aimed to be a convenient and handy toolkit to check out your ideals and help to developers implement finance and statistics functions calculation support to their applications. Math toolkit enables you to calculate the compound rate, the present or future value, annuities and more. As for the statistics field, it supports the following functions: median, mean, variance, covariance, standard deviation, and linear regression.