Mathematical Notation

Chords is a free MIDI playback and sheet music notation editor. Oriented for guitars, it shows chord and scale diagrams, it also allows adding chords and scales to sheet music. It supports multiple track playback. Platforms: Windows

Base Converter is a tool for converting numbers between binary, octal, decimal and hexadecimal notation. Platforms: Windows

ExpressionParser is a Java based utility that may be invoked from Java code to parse mathematical expressions. It is useful for programmers developing calculators, graphing utilities or other math related programs. Platforms: Any Browser

Surface Explorer 3D, better known in abbreviated form as SurfX3D, is a free program to convert mathematical surfaces into magnificent 3D graphs. The user defines the surface equations in an implicit or parametric way, and it also lets you define the image colours.The result can be exported to the... Platforms: Windows

Rapid Pi is an add-on for Microsoft Word that lets you insert mathematical symbols and expressions easily. Have you ever noticed what a hassle it is to write maths, fractions, powers, etc? Normally in these cases you waste time looking in submenus, inserting symbols, etc, clicking a lot and... Platforms: Windows

WidTex is a widget that shows you an on-screen graphic of any mathematical problem you write.WidTex lets you get images of the mathematical expressions you specify using mimeTex. It is an insignificantly small program (38Kb), completely free and requires no installation on your hard drive. Platforms: Windows

Graph Limited School Edition is a simple open code tool (and totally free) that works to represent mathematical functions and graphs in a system of coordinates.This version of Graph is oriented above all to college students, as it doesn`t have support for abstract algebraic symbol... Platforms: Windows

For the set of chemical elements (Ba, Sr, Ca and so on) there is a function enabling to print capital and small letters without switching by "Shift" and "Caps Lock" keys. Figures specifying the number of atoms in chemical formula (H2SO4) are automatically made subscripts, and atom's oxidation... Platforms: Windows

iabc is a free (open source) program for editing music. It uses the ABC music notation language to produce high-quality graphical notation or MIDI output. The music notation and the ABC notation can be updated in real-time, making the construction of tunes using the ABC language hassle-free (or... Platforms: *nix

Math::Numbers is a Perl module that contains methods for mathematical approaches of concepts of the number theory. SYNOPSIS use Math::Numbers; my $a = 123; my $b = 34; my $numbers = Math::Numbers->new($a, $b [, ...]); print "They are coprimes (relatively primes)!n" if... Platforms: *nix

IPlib is a Python module to convert between many different IP address notations and to manage netmask/address pairs in the CIDR notation. Some example scripts ("ipconv", "nmconv", and "cidrinfo") are included.. Platforms: *nix

Gnofract 4D is a free, open source program which allows anyone to create beautiful images called fractals. The images are automatically created by the computer based on mathematical principles. These include the Mandelbrot and Julia sets and many more. You don't need to do any math: you can... Platforms: *nix

Unicode::Overload is a Perl source filter to implement Unicode operations. SYNOPSIS use charnames :full; use Unicode::Overload ( "N{UNION}" => infix => sub { my %a = map{$_=>1}@{$_[0]}; my %b = map{$_=>1}@{$_[1]}; return keys(%a,$b); }, "N{SUPERSCRIPT TWO}" => postfix => sub { $_[0] **... Platforms: *nix

Games::Chess Perl module represent chess positions and games. SYNOPSIS use Games::Chess qw(:constants); my $p = Games::Chess::Position->new; $p->at(0,0,BLACK,ROOK); $p->at(7,7,WHITE,ROOK); print $p->to_text; The Games::Chess package provides the class Games::Chess::Piece to represent... Platforms: *nix

KSpread is a scriptable spreadsheet program which provides both table-oriented sheets and support for complex mathematical formulas and statistics.. K Desktop Environment Homepage, KDE.org Platforms: *nix

Formulas Rendering Plug-In for the Gimp 2 is a simple plugin that allows you to change the values of each color channel of each pixel of a layer by using mathematical expressions. It is able to handle RGB* and Gray* images. Available operators are: +, -, *, /, ^, and %. There are many functions... Platforms: *nix

RPN is a Perl extension for Reverse Polish Math Expression Evaluation. SYNOPSIS use Math::RPN; $value=rpn(expr...); @array=rpn(expr...); expr... is one or more scalars or lists of scalars which contain RPN expressions. An RPN expression is a series of numbers and/or operators separated... Platforms: *nix

Gcalctool is the default GNOME desktop calculator. Gcalctool has Basic, Financial and Scientific modes. Internally it uses multiple precision arithmetic to produce results to a high degree of accuracy. Calctool is a desktop calculator. It has been designed to be used with either the mouse or... Platforms: *nix

libease is a shared library containing easing algorithms that can be used for graphical effects or mathematical calculations. libeases main goal of is to try and create a centralised library for easing effects within the window manager environment. Installation: Beginners: This is... Platforms: *nix

Fenris is a suite of tools suitable for code analysis, debugging, protocol analysis, reverse engineering, forensics, diagnostics, security audits, vulnerability research and many other purposes. The main logical components are: - Fenris: high-level tracer, a tool that detects the logic used... Platforms: *nix