Google Talk

Speak to all your Google contacts

Messenger Plus! Live

More functions and utilities for Windows Live Messenger

WhatsApp Recovery

Whatsapp recovery tool for iPhone and Android

Easy Message

Bring together all the messaging services you use in a single client

Hangouts

Google's chat for Windows

QQ International

The messaging application to communicate at global level

Wassapp

WhatsApp client for Windows

Facebook Chat Desktop

Desktop client for Facebook chat

Messenger

Instant messaging application for Windows 7

Psi

Simple and efficient instant messaging client compatible with Jabber

Microsoft Lync Server

Total communication for companies

ThatsaPC

Chat on WhatsApp from Windows

IGdm

More features for Instagram messaging

WhatsappTime

Alternative WhatsApp client for Windows

MSN Winks Plus

Add new winks to Messenger

Franz

14 messaging services in 1

Mathematica

Platform for computational development

Statgraphics

Carry out statistical analyses on your data

WinPlot

Generate 2D and 3D graphics

Microsoft Mathematics

Solve mathematical operations with this free tool

Derive

Powerful tool for symbolic mathematic calculations

Mathcad

Software for engineering calculations

GeoEnZo

Digital board to teach and learn maths

IBM SPSS Statistics

Poweful software to collect and analyze statistical data

GeoGebra

Software to learn maths at all levels

MathType

Complete mathematical equation and formula editor

Maple

Solve complex mathematical operations

PASW

One of the most powerful statistic solutions on the market

MATLAB

Maths software tool for PC

Octave

Applied calculus software very similar to MATLAB

Minitab

One of the best statistical calculation programs