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Functions from this package are useful for number theory applications. For example, in two-keys cryptography. See /tests/RSA.php in the package for example of simple implementation of RSA-like cryptoalgorithm. See http://chat.finalcombat.com/vayala/big_int/ page for more complex implementation of RSA-like crypto, which supports key generating, encrypting/decrypting, signing and validating of sign. The package has many bitset functions, which allow to work with arbitrary length bitsets. This package is much faster than bundled into PHP BCMath and consists almost all functions, which are implemented in PHP GMP extension, but it needn't any external libraries.

ANN is a library written in C++, which supports data structures and algorithms for both exact and approximate nearest neighbor neighbor searching in arbitrarily high dimensions.

Clarence is a small Gtk gui based programmer's calculator.

the Auto Payment Calculator V1.0 Release Copyright (C) 1997 Eric A. Griff Auto Payment Calculator is a simple, xforms based, application for use under the X-windows system, that calculates auto loan payments. It is pretty straight forward. You enter the Principal (Amount), Term (in months), and Rate, and then with either [RETURN] (or [enter] or whatever your keyboard equivelent is), (ALT-C), or clicking the calculate button; you will have the payment in months, as well as number of weeks, and weekly payment. You may also [TAB] through the Amount, Term, and Rate, as well as hold down ALT and press the character in its Name that is underlined to go do that function. As long as all three are filled in, you may hit [ENTER] to Calculate right there. This makes it easy to cycle quickly through numerous terms, amounts, and rates.

The Clipper library primarily performs boolean clipping (intersection, union, difference and xor) on polygons in 2D space. There are no restrictions on either the number nor the type of polygon that can be clipped. They can have holes, be self-intersecting and even have coincident edges. The library also performs polygon offsetting

This extension for PHP provides routines for manipulating bitsets.

ARPACK++ is a collection of classes that offers c++ programmers an interface to ARPACK. It preserves the full capability, performance, accuracy and low memory requirements of the FORTRAN package, but takes advantage of the C++ object-oriented programming environment.

This extension for PHP provides routines for manipulating bitsets.

Concorde is a computer code for the traveling salesman problem (TSP) and some related network optimization problems. The code is written in the ANSI C programming language and it is available for academic research use; for other uses, contact bico@isye.gatech.edu for licensing options. Concorde's TSP solver has been used to obtain the optimal solutions to 106 of the 110 TSPLIB instances; the largest having 15,112 cities. The Concorde callable library includes over 700 functions permitting users to create specialized codes for TSP-like problems. All Concorde functions are thread-safe for programming in shared-memory parallel environments; the main TSP solver includes code for running over networks of Unix workstations.

ARPACK software is capable of solving large symmetric, nonsymmetric, and generalized eigenproblems. The software is designed to compute a few (k) eigenvalues with user-specified features, such as those of largest real part or largest magnitude. Storage requirements are on the order of n*k locations, and no auxiliary storage is required. A set of numerically orthogonal Schur basis vectors for the desired k-dimensional eigen-space is computed. Numerically accurate eigenvectors are available on request.