IMVU

Instant messaging and chats in 3D environments

Telegram Messenger

Telegram's desktop client for Windows

QQ International

The messaging application to communicate at global level

WhatSender

Send multiple WhatsApp messages from your PC

Hangouts

Google's chat for Windows

Wassapp

WhatsApp client for Windows

WA Web Plus

An extension to use WhatsApp Web with more functions

Messenger for Desktop

Facebook Messenger on your Windows desktop

Messenger Plus! Live

More functions and utilities for Windows Live Messenger

imo

Talk to your friends from your PC

WhatsappTime

Alternative WhatsApp client for Windows

WhatsApp Viewer

Tool to view WhatsApp chats on PC

Signal

Instant messaging and chat app that guarantees anonymity

Telefuel

Alternative Telegram client focused on productivity for PCs

Windows Live Messenger

The departed Messenger by Microsoft

Messenger

Instant messaging application for Windows 7

Voicemeeter

Audio mixer that allows you to change your voice

mp3DirectCut

A simple and efficient MP3 file editor

BestPractice

Change the tempo and tone of any song in real time

MP3Gain

Easily modify the gain of your MP3 files

Kangas Sound Editor

Create your own music from scratch

Sonic Visualiser

Inspect the contents of your audio files

Acoustica

Edit your audio files with dozens of different tools

Sofonesia MP3 Clipper and Joiner

Simple tool to cut and join MP3 files

Music Editor Free

Complete music editor that offers professional results

Skype Voice Changer

Disguise your voice when using Skype

Magix Audio Cleaning Lab

Digitize your LPs and cassettes obtaining the best sound

PolderbitS Sound Recorder and Editor

Two practical and lightweight audio tools

MP3 Workshop

Work with your MP3 files

AudioQuick Editor

Quickly learn to edit your audio files

ACID Xpress

The free version of one of the best sound editors around