TeamSpeak

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Battle.net

A VoIP application and platform designed for creating communities and connecting gamers, and people rallying around specific causes. The Discord client is a free to use and can handle text, image, video and audio communication between users in a chat channel. Currently over 250 million users use the software to connect with others across the globe.

Skype is a telecommunications application that specialize in providing video chat and voice calls between computers, tablets, mobile devices and consoles. The software allows you to connect with friends and business colleges worldwide. Skype provides free online calls, messaging, affordable international calling to mobiles or landlines and Skype for Business for effective collaboration among teams.

Mumble is a free and open-source voice over IP application primarily designed for gamers. The application features a customizable in game overlay, application skins, conversation recording, and advanced voice activity detection. Anyone can download and use Mumble for free, but if you want your own server, you can rent a managed solution from the company behind Mumble, or host your own.

Steam is where most gamers come to buy and play computer games. Steam is a video game digital distribution service by Valve. The software can be used to both buy and launch games, it also packs social features allowing you to make friends and play games with or against them. The Steam platform can also be used by game developers and publishers to launch and sell games to users of the platform.

With GOG Galaxy you can organize your games across platforms into one functional and beautiful library. The software allows you to import all your games from PC and consoles, build and organize them into one master collection. Within the user interface you can keep track of all your achievements, hours played and games owned, combined across platforms, and install and launch any PC game you own, no matter the platform.