Julia bindings to the FFTW library for fast Fourier transforms
Visualization components
Perl Lib Math Notation
Cross-platform, scientific graphics plotting library
A graphing calculator that's both powerful and easy to use.
Library Finance Math for GCC (C++)
Finance library for C++
a financial math library and financial market data database
WYSIWYG engineering calculations in MS Excel, report generation.
Rpn calculator, string and macro based
A quick and easy timer. One exe file, one data input, one beep.
A C++ and Python library for finance, statistics and linear algebra.