Scilab

The most comprehensive tool to perform numerical calculations

WinPlot

Generate 2D and 3D graphics

Derive

Powerful tool for symbolic mathematic calculations

Geometry

Complete trigonometry and geometry calculations easily

Octave

Applied calculus software very similar to MATLAB

MathType

Complete mathematical equation and formula editor

PASW

One of the most powerful statistic solutions on the market

GeoEnZo

Digital board to teach and learn maths

Maple

Solve complex mathematical operations

Graphing Calculator 3D

Draw any 2D or 3D function almost instantly

Microsoft Mathematics

Solve mathematical operations with this free tool

Euler Mathematical Toolbox

Complete numerical and algebraic computation system

Mathematica

Platform for computational development

Mathcad

Software for engineering calculations

Gretl

Application for econometric analyses

Statgraphics

Carry out statistical analyses on your data

Ad-Aware

Clean out trojans, keyloggers, dialers and other malware

Spyware & Adware Remover

Protect your computer from malicious programs

SpyHunter

Find viruses and dangerous software

Spyware Doctor

Detect and protect your PC against threats like Spyware, Adware or Trojans

F-Secure Internet Security

Complete security solution for safe navigation on the Internet

Nixory

Protect your browsing privacy

Code Verify

Find out if you are being spied on WhatsApp

UnChrome

Improve the security and privacy of Chrome with a single click

Trend Micro Anti-Spyware

Get rid of any spyware on your computer

CA Anti-Spyware

Detect and remove all spyware threats

Spybot Search & Destroy

Start removing spyware from your PC

AdwCleaner

Remove adware and other unwanted software

Spy Emergency

Detect and eliminate any spyware from your computer

XP Privacy

A fully fledged solution to protect your computer's private data

Milano

Check out HT's intrusions