Mathematica

Platform for computational development

GeoEnZo

Digital board to teach and learn maths

Scilab

The most comprehensive tool to perform numerical calculations

WinPlot

Generate 2D and 3D graphics

Maple

Solve complex mathematical operations

Microsoft Mathematics

Solve mathematical operations with this free tool

Derive

Powerful tool for symbolic mathematic calculations

MathType

Complete mathematical equation and formula editor

Graphing Calculator 3D

Draw any 2D or 3D function almost instantly

Statgraphics

Carry out statistical analyses on your data

PASW

One of the most powerful statistic solutions on the market

Gretl

Application for econometric analyses

Euler Mathematical Toolbox

Complete numerical and algebraic computation system

Octave

Applied calculus software very similar to MATLAB

Geometry

Complete trigonometry and geometry calculations easily

Mathcad

Software for engineering calculations

QQ International

The messaging application to communicate at global level

Messenger for Desktop

Facebook Messenger on your Windows desktop

Telegram Messenger

Telegram's desktop client for Windows

Windows Live Messenger

The departed Messenger by Microsoft

WA Web Plus

An extension to use WhatsApp Web with more functions

imo

Talk to your friends from your PC

LINE

Instant messaging from your PC

Facebook Messenger

Chat with your contacts from your desktop

WeChat

The Windows version of the popular Chinese messaging app

WhatsApp Messenger

The official version of WhatsApp for Windows

WhatSender

Send multiple WhatsApp messages from your PC

Signal

Instant messaging and chat app that guarantees anonymity

IMVU

Instant messaging and chats in 3D environments

WhatsApp Viewer

Tool to view WhatsApp chats on PC

Telefuel

Alternative Telegram client focused on productivity for PCs