UPX

Compress your executable files

Free RAR Extract Frog

Decompress your RAR file free

WinArchiver

Comprehensive tool to work with compressed files

BitZipper

Compressor with support for many formats

FILEminimizer Office

Reduce the size of your Office files up to 98%

gzip

Free compressor that has been ported from Linux

Hamster Free ZIP Archiver

Quickly compress and extract your files

ZipGenius

All the necessary tools to create, open and administer compressed files

ArcConvert

Transform a file's compression format

KuaiZip

A free multiformat compressor

WinAce

The best compression application for ACE files

PowerArchiver

One of the most powerful multiformat compressors

Bandizip

A very easy-to-use compressor

WiZ

Free lightweight ZIP compressor

8 Zip Lite

Compressor compatible with several formats

DataNumen RAR Repair

Repair RAR and SFX files

Octave

Applied calculus software very similar to MATLAB

GeoGebra

Software to learn maths at all levels

IBM SPSS Statistics

Poweful software to collect and analyze statistical data

GeoEnZo

Digital board to teach and learn maths

Microsoft Mathematics

Solve mathematical operations with this free tool

PASW

One of the most powerful statistic solutions on the market

Derive

Powerful tool for symbolic mathematic calculations

Mathcad

Software for engineering calculations

Maple

Solve complex mathematical operations

Minitab

One of the best statistical calculation programs

WinPlot

Generate 2D and 3D graphics

Mathematica

Platform for computational development

MATLAB

Maths software tool for PC

Statgraphics

Carry out statistical analyses on your data

MathType

Complete mathematical equation and formula editor