Linphone - Linphone is an internet phone or Voice Over IP phone (VoIP).
Skype - Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.
MicroSIP - MicroSIP is a free portable SIP softphone for Windows based on PJSIP stack.
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
We-Talk - Free online chat rooms where people chat and meet each other and chat with the stranger and learn new cultures and make friends.
Facebook Messenger - Facebook Messenger is a faster way to message.