Handles parsing, rounding, and displaying numbers for scientific applications.

A class library devoted to simulation, including an ODE solving package, as well as least square estimators, solvers, polynomials, basic statistics features. [Open source, BSD-like]

A light-weighted (re)implementation of the Java Expression Parser (jep.sourceforge.net). The intention is to strip some of its not-so-often-used features, and thus speeding the rest. Includes expression optimizer. [Open source, GPL]

Offers multiple replacement implementations for java.util.Random. [Open Source]

Improved BigDecimal class from IBM. [Open source]

Package to parse and evaluate mathematical expressions at runtime. [Commercial]