An equation solving library that finds solutions to equation sets. A set of equations can be passed in as text, while AutoAbacus attempts to find a solution that satisfies all constraints. [Commercial, trial version]

Search algorithms on graphs implicitly given by tree node expansion operator and edge transition cost function. Site includes short description and download option. [GNU Library or LGPL]

Working group that offers presentation, news, and libraries related to numerical computing.

Parses and computes expressions or functions primarily for use in spreadsheet applications such as the example provided. [Beta Evaluation]

Java classes for parsing and evaluating mathematical expressions. Supports multiple variables and user-defined functions. [Open source, GPL or commercial]

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]

A class library that provides mathematical graph-theory objects and algorithms. JGraphT supports a rich gallery of graphs and is designed to be powerful, extensible and easy to use. [Open source, LGPL]

A mathematical Java toolbox designed to be easily used and modified for scientific software engineering. [Open source, BSD License]

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