### Online Math Calculator

•        184

This is an Online Math Calculator. What this does is take your equation in the usual form and convert every variable to x, y, and every constant to a, b, c, d, e, etc... use wolfram|alpha and then convert back to the input format. This allows to input most equations.

http://onlinemath.codeplex.com/

 Tags alpha calculator derivate differential electronics engineering equation Implementation License MIT Platform Windows

## mhcfs2

•    Delphi

Engineering calculator ; Calculates also integrals, the sums, products, derivatives; Solve LSE, ODE, LSODE; Finds roots; calculations with matrixes. Interpolation with cubic splain.(math expression calculator) (scientific calculator) (numerical, integral, derivative, root, matrix, differencial, differentiation, equation )

## DifferentialEquations.jl - Julia suite for high-performance solvers of differential equations

•    Julia

The well-optimized DifferentialEquations solvers benchmark as the some of the fastest implementations, using classic algorithms and ones from recent research which routinely outperform the "standard" C/Fortran methods, and include algorithms optimized for high-precision and HPC applications. At the same time, it wraps the classic C/Fortran methods, making it easy to switch over to them whenever necessary. It integrates with the Julia package sphere, for example using Juno's progress meter, automatic plotting, built-in interpolations, and wraps other differential equation solvers so that many different methods for solving the equations can be accessed by simply switching a keyword argument. It utilizes Julia's generality to be able to solve problems specified with arbitrary number types (types with units like Unitful, and arbitrary precision numbers like BigFloats and ArbFloats), arbitrary sized arrays (ODEs on matrices), and more. This gives a powerful mixture of speed and productivity features to help you solve and analyze your differential equations faster. For information on using the package, see the stable documentation. Use the latest documentation for the version of the documentation which contains the un-released features.

## Electronic Engineering Tool

•    PHP

A very usefull tool when working with electronics, from amature to engineer, ex. Converter: Fahrenheit-Celsius-Kelvin, Dec-Hex-Bin-Oct, etc. Calculator: Ohms Law, Coil Reactance, Capacitor Reactance, Thermal Resistant (C/W), Decibel (dB) etc.

## ezQuake

•    PHP

ezQuake seeks to unify the development of QuakeWorld clients

## Code for Robots

•    DotNet

Code for Robots creates, simplifies and shares code for robotics, electronics, engineering and science projects. We aim to help everyone from hobbyists to large

## QPlot - Advanced Calculator for Qtopia

•    C++

QPlot - an Advanced Mathematical Calculator Includes: natural-style input, 2-D and 3-D graphing, differentiating, integrating, equation solving, C-like PROGRAMMING, and a lot more! What's most exciting, it is EXTENSIBLE!

## FiPy

•    C

An object-oriented partial differential equation (PDE) solver, written in Python, based on a standard finite volume approach and includes interface tracking algorithms. *WARNING* The project is no longer using Sourceforge to maintain its repository.

## Virtual Laboratory Environment

•    SR

A multi-modeling and simulation environment to study complex systems

## TclODE - ODE Solver for Tcl

•    Perl

Ordinary Differential Equation (ODE) solver for Tcl. Handles both stiff and non-stiff sets of equations; does time-evolved initial value problems and root finding. Based on the popular Lawrence Livermore solver LSODE.

## SODE

•    Ruby

Program to generate a program to numerically solve either a single ordinary differential equation or a system of them.It is a Ruby program, now called omnisode, which generates either Ruby, C, C++, Maple or Maxima code. Code can be generated for all languages under Linux. Ruby can be generated under Windows. All can be generated under cygwin, but would need work on execution of Maple. Omnisode itself is Ruby, which is needed in all cases to generate the program.

## SDE Toolbox

•

A MATLAB package to simulate sample paths of the solution of a Itocirc; or Stratonovich stochastic differential equation (SDE), compute statistics and estimate the parameters from data. A note of caution: SDE Toolbox is no more developed but it's still downloadable. Its inferential capabilities can be considered surpassed (at best). Actually the parameter estimation methods were already far from the state-of-art when the project began in 2007 (!). The considered implemented parametric and

## Object-oriented Scientific Computing Lib

•    C++

An object-oriented library for scientific computing in C++.

## black-hole

•    Javascript

Demo and explanatory blog post. In the time-honored tradition of taking yet another noun and making .js file out of it, I proudly present black-hole.js, which uses a numerical ordinary differential equation solver from numeric.js, and some nice WebGL utilities from glfx.js, to render the gravitational lensing of a black hole.

## EasyFunktion

•    C++

Easy Funktion is an easy to use function plotter that supports complex numbers as well as real numbers. Additional features are equation solving, approximation functions and a built in pocket calculator.

## pfcalc

•    C++

pfcalc is a pipe friction calculator using the Darcy-Weisbach equation. gpfcalc is a Gtk front-end for pfcalc. Qpfcalc is a Qt front-end for pfcalc.

## DanderSpritz_lab - A fully functional DanderSpritz lab in 2 commands

•    HTML

The goal of DanderSpritz lab is to allow researchers and defenders to quickly stand up a fully functional version of DanderSpritz - The Equation Group's Post exploitation tool-set and a Windows Server 2008 Domain and client as targets. The Windows target have some reverse engineering tools that I found useful while investigating DanderSpritz and it's capabilities. NOTE: This lab has not been hardened in any way (it is intentionally vulnerable) and runs with default vagrant credentials. Please do not connect or bridge it to any networks you care about.

## open-source-rover - A build-it-yourself, 6-wheel rover based on the rovers on Mars!

•    TeX

The JPL Open Source Rover is an open source, build it yourself, scaled down version of the 6 wheel rover design that JPL uses to explore the surface of Mars. The Open Source Rover is designed almost entirely out of consumer off the shelf (COTS) parts. This project is intended to be a teaching and learning experience for those who want to get involved in mechanical engineering, software, electronics, or robotics. JPL is always looking to inspire the next generation of scientists, engineers, and roboticists to help us explore and learn about our solar system (and beyond!). We release the plans for this rover as a way to try and give budding enthusiasts a fun robotics project that will help teach them and get them involved in robotics sooner and at a lower cost.

## differential-dataflow - An implementation of differential dataflow using timely dataflow on Rust.

•    Rust

An implementation of differential dataflow over timely dataflow on Rust. Differential dataflow is a data-parallel programming framework designed to efficiently process large volumes of data and to quickly respond to arbitrary changes in input collections.

## MathCast Equation Editor

•    C++

A Mathematics Equation Editor. Lets you type in equations, which can be added to documents and webpages. It features a simple graphical interface, equation list management, MathML support, and the unique feature "Mathcasting" for adding math to XHTML.

## Arduino - Electronics Prototyping Platform

•    C

Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. It's intended for artists, designers, hobbyists, and anyone interested in creating interactive objects or environments.

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