1. Hangouts bring conversations to life with photos, emoji, and even group video calls for free. Connect with friends across computers, Android, and Apple devices.

  2. A messaging app for teams who see through the Earth!

  3. Skype for Business, formerly Lync, is unified communications platform that enables instant messaging, conferencing and online meetings

  4. WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.

  5. Free and secure calls and messages to anyone, anywhere. Keep your conversations going no matter where you are.

  6. Send messages, files, create groups and make Tox to Tox audio and video calls. Securely.

  7. Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.

  8. Open-source video calling and chat platform.

  9. GoToMeeting is a web conferencing service offering a range of services which are available on Mac, PC, iOS and Android devices.