ATCalc

Customizable scientific and graphic calculator

OpalCalc

Multiline calculator that integrates natural language

Calculator

Carry out the fastest maths calculations

Virtual Moon Atlas

Complete and appealing virtual atlas of the Moon

SpeedCrunch

Mathematical calculations within everyone's grasp

PowerToy Calc

A much more complete version of the Windows Calculator

Sky Charts

Hundreds of star charts in a single program

Abacux

Calculus program developed for chemists, physicists and architects

Oxford Dictionary of English

The best English dictionary for Windows

Versaverter

Easily convert measurement units

Microsoft Translator

Microsoft's language translator for Windows

Khi3

Complete scientific calculator with plenty of options

Celestia

Travel around the Universe from your PC

Moffsoft FreeCalc

Useful calculator similar to that of Windows

Scalextric Track Length Calculator

Measure the length of your slot tracks

English-Spanish Interpreter

Offline English Spanish translator for your PC

Spark

Complete mail client compatible with different services

Turbo Mailer

Send mass emails

Windows Live Mail

Microsoft's multi-account email client

Mailspring

Mail client to boost user productivity

Mail Bomber

One of the best massive email delivery programs

Yahoo Mail

Access to your Yahoo email account

Zimbra Desktop

Manage all your accounts from the same application

Inky

Receive all your emails in a single client

Thunderbird Portable

Use this email manager on any PC with a USB port

Free Email Extractor

Easily gather email addresses

Mail, Calendar, and People

Plan your day and keep in touch

Microsoft Outlook

Microsoft's email client

Stellar Converter for OST

Convert your Outlook emails to PST format

IncrediMail

Customize your email's appearance and give your friends a surprise

Outlook Connector

Use your Hotmail accounts straight from Outlook