Hangouts

Google's chat for Windows

Psi

Simple and efficient instant messaging client compatible with Jabber

Microsoft Lync Server

Total communication for companies

QQ International

The messaging application to communicate at global level

Messenger

Instant messaging application for Windows 7

Google Talk

Speak to all your Google contacts

Franz

14 messaging services in 1

IGdm

More features for Instagram messaging

WhatsApp Recovery

Whatsapp recovery tool for iPhone and Android

Wassapp

WhatsApp client for Windows

ThatsaPC

Chat on WhatsApp from Windows

Facebook Chat Desktop

Desktop client for Facebook chat

WhatsappTime

Alternative WhatsApp client for Windows

Easy Message

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

MSN Winks Plus

Add new winks to Messenger

Messenger Plus! Live

More functions and utilities for Windows Live Messenger

Mail, Calendar, and People

Plan your day and keep in touch

Free Email Extractor

Easily gather email addresses

Microsoft Outlook

Microsoft's email client

Stellar Converter for OST

Convert your Outlook emails to PST format

Yahoo Mail

Access to your Yahoo email account

Spark

Complete mail client compatible with different services

IncrediMail

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

Inky

Receive all your emails in a single client

Outlook Connector

Use your Hotmail accounts straight from Outlook

Thunderbird Portable

Use this email manager on any PC with a USB port

Zimbra Desktop

Manage all your accounts from the same application

Mailspring

Mail client to boost user productivity

Windows Live Mail

Microsoft's multi-account email client

Mail Bomber

One of the best massive email delivery programs

Turbo Mailer

Send mass emails