Discord
All-in-one voice and text chat for gamers that's free, secure, and works on both your desktop and phone.
Stop paying for TeamSpeak servers and hassling with Skype. Simplify your life.
Share photos, videos, music, files, documents and more between all of your devices. File sharing from phone to PC, phone to phone, PC to phone, PC to tablet.
WhatsApp for PC is a cross-platform mobile messaging app which allows you to exchange messages without having to pay for SMS.
µTorrent is an efficient BitTorrent client that is lightweight, and powerful. It offers fast downloads with automatic
bandwidth management.
Software bundle from Microsoft containing Mail, Messenger, Movie Maker, Photo Gallery, Writer, Toolbar and Family Safety
Facebook Messenger for anyone who wants to have persistent access to Facebook chat.
Telegram is a messaging app with a focus on security and speed. Messages are heavily encrypted and can self-destruct. You can access your messages from multiple devices.
Thunderbird is email and calendar software by Mozilla (the maker of Firefox) that offers the same functionality as the (commercial) office application Microsoft Outlook.