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. Open-source video calling and chat platform.

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

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

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

  9. Trillian is a decentralized and federated instant messaging platform that lets your whole company send private and group messages, keep tabs on what co-workers are doing, share files, and much more.

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