Computer Algebra System written in Common Lisp
Precision Trigonometry: Advanced Calculator for Complex Math
Command-line calculator and libray.
Simple Long Integer Math for C++
An in-place external sort
Numerical models for chemical and process engineering
sparse and dense matrix, linear algebra, visualization, big data
Log-linear analysis (data modelling) for high-dimensional data
Fixed-length Arithmetic-types library
PMML-compliant scoring engine and analytic toolkit
a free cross platform calculator for calculating BIG numbers