Google voice and video chat
Call anywhere in the US and Canada for free and get low rates for other countries with this small plugin, right from within Gmail
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 web is a platform independent messaging app which allows you to communicate for free.
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
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.