Microsoft Lync 2013

Feature-rich business messaging and web conferencing tool with simple interface and strong productivity-focused collaboration

A free tool used to text, call and video chat

Lightweight multi-network chat client that runs from USB, keeping conversations portable, simple, and secure

Version of the popular open-source instant messaging software

Well-rounded VoIP software that enables free communication using any modern device

Fast, privacy-focused messaging with massive group chats, broadcast channels, and simple, intuitive design

Feature-rich open-source Telegram client offering multi-account support, enhanced privacy, and flexible media playback