Messaging and Chat

Skype Skype — free program that allows you to make phone calls directly from your computer.
Mozilla Thunderbird Mozilla Thunderbird — powerful mail client for efficient work with e-mail.
Miranda IM Miranda IM — compact program for online communication, which includes reading messages by voice.
ICQ ICQ — popular messenger for text messaging and audio / video calls.
ooVoo ooVoo — free program for video chatting over the Internet in real time.
RaidCall RaidCall — utility for communication groups, is used to participate in games with many users.
TeamSpeak TeamSpeak — utility that works on VoIP technology, allowing you to perform voice communication.
Telegram Desktop Telegram Desktop — program designed for Windows, giving the opportunity to communicate at a distance.
Viber Viber — free utility for Windows that allows you to make voice and video calls.
WhatsApp WhatsApp — chat client that can be used on a Windows computer.