Octave

Applied calculus software very similar to MATLAB

Gretl

Application for econometric analyses

Statgraphics

Carry out statistical analyses on your data

Scilab

The most comprehensive tool to perform numerical calculations

GeoEnZo

Digital board to teach and learn maths

Derive

Powerful tool for symbolic mathematic calculations

PASW

One of the most powerful statistic solutions on the market

Microsoft Mathematics

Solve mathematical operations with this free tool

Mathematica

Platform for computational development

Euler Mathematical Toolbox

Complete numerical and algebraic computation system

Mathcad

Software for engineering calculations

Graphing Calculator 3D

Draw any 2D or 3D function almost instantly

MathType

Complete mathematical equation and formula editor

Geometry

Complete trigonometry and geometry calculations easily

Maple

Solve complex mathematical operations

WinPlot

Generate 2D and 3D graphics

Packetyzer

Packet capturer based on the Ethereal project

IPConfig

A graphical interface for the command of the same name

NetworkMiner

Analyze passively the packets of your local network

Easy Hide IP

Hide your IP address and your geographic location

NetGhost

Define your IP for each WLAN that you connect to

Hide IP

Maintaining your privacy is very simple with this program

Angry IP Scanner

Scan both IPs and port ranges

DynSite

Automatically updates your dynamic IP, very useful for dynamic Internet connections

Advanced IP Scanner

Analyze the computers connected to your local network

Find MAC Address

A simple way to find out MAC addresses

No-IP

Assign a name to your IP address

Real Hide IP

Hide you IP address from prying eyes

NMapWin

Assess your network security by scanning ports