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Mumble was the first and is the most successful and wide spread free and open source software for VoIP. It was the first VoIP software to provide low-latency audio suitable for gaming, and at the same time was a pioneer in high audio quality at the same time.

TeamSpeak is a proprietary Voice over IP software that allows users to speak on a chat channel with other users, much like a telephone conference call. A TeamSpeak user will often wear a headset with an integrated microphone. Users use the TeamSpeak client software to connect to a TeamSpeak server of their choice, from there they can join chat channels.The target audience for TeamSpeak is gamers, who can use the software to communicate with other players on the same team of a multiplayer game. Communicating by voice gives a competitive advantage by allowing players to keep their hands on the controls. »

Google Allo is a smart messaging app that helps you say more and do more. Express yourself better with stickers, Smart Reply, and HUGE emojis & text. Allo brings you the Google Assistant.

Ventrilo is a real-time voice chat software for group communications with surround sound support.

Turn your phone into a Walkie Talkie.

VoicePing is a Smartphone based app that gives you the function of PTT and more!All packaged with an intuitive app, secured environment and simpler deployment, it's way better than PTT. It offers Lower Cost on Device and Plans, Unlimited Use at One price and an Infinite Range & Indoor Coverage.

Sesame is a messaging app that gives you a self-aware digital assistant to protect messages on your behalf: your own Personal Cognitive Messenger™.

Paltalk is an instant messaging service that enables users to communicate via internet chat, voice and video chat. It offers chat rooms and the ability for users to create their own public virtual chat room.

Talk2Me allows Push To Talk or Walke-Talkie like functionality for Windows Phone 7 Users.

WowApp helps you do good through the Power of Sharing. We share all revenues with you. WowApp Messenger is free and you can receive earnings without ever spending money.

Tribe is the easiest way to message. Just press and hold to record a message. Release to send.

4talk IM service is a complete IM service for communicating with your phone contacts using your PC in the office or at home. You can transfer files and messages and access your correspondence from your mobile devices.

Coco Voice is a Walkie Talkie app to share voice, text, and pictures.

- Send and receive voice messages with other HeyTell users with the press of a single button