Microsoft Outlook

Microsoft's email client

Turbo Mailer

Send mass emails

mIRC

Chat on IRC with this great client

Trillian

A multiplatform chat client

Yahoo Mail

Access to your Yahoo email account

Chord Scale Generator

All the scales and chords a your reach

Windows Live Mail

Microsoft's multi-account email client

IncrediMail

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

Zimbra Desktop

Manage all your accounts from the same application

Outlook Connector

Use your Hotmail accounts straight from Outlook

Guitar Tuner

How to tune your guitar or any other string instrument

Mail Bomber

One of the best massive email delivery programs

Visual Chat

Create your own chat channel in 3D

ICQ

Complete instant messaging client integrated with social networks

Free Email Extractor

Easily gather email addresses

Pirch

One of the most popular IRC clients of its time

LINE

Instant messaging from your PC

IMVU

Instant messaging and chats in 3D environments

Telegram Messenger

Telegram's desktop client for Windows

Telefuel

Alternative Telegram client focused on productivity for PCs

Facebook Messenger

Chat with your contacts from your desktop

WhatsApp Messenger

The official version of WhatsApp for Windows

Windows Live Messenger

The departed Messenger by Microsoft

Signal

Instant messaging and chat app that guarantees anonymity

WA Web Plus

An extension to use WhatsApp Web with more functions

QQ International

The messaging application to communicate at global level

WhatsApp Viewer

Tool to view WhatsApp chats on PC

WeChat

The Windows version of the popular Chinese messaging app

imo

Talk to your friends from your PC

WhatSender

Send multiple WhatsApp messages from your PC

Messenger for Desktop

Facebook Messenger on your Windows desktop