Curse is an online game portal and network of gaming websites.

Flock is a communication app for teams. Packed with tons of productivity features, Flock drives efficiency and boosts speed of execution.

Gitter is an open source instant messaging and chat room system for developers and users of GitHub repositories.

Mattermost is an open source, private cloud Slack-alternative, Workplace messaging for web, PCs and phones. MIT-licensed.

Overwolf is a software platform which allows developers to create extensions (called applications by Overwolf Ltd.) for video games.

Ring (SFLphone) is an open-source SIP-compatible softphone and instant messenger for Linux, Microsoft Windows, OS X and Android.

Dialog Messenger is a handy and feature-rich enterprise multi-device messenger available for server or cloud.

Garena is a consumer Internet platform.

Matrix is an open protocol for real-time communication. It is designed to allow users with accounts at one communications service provider to communicate with…

Mumble is an open source, low-latency, high quality voice chat software primarily intended for use while gaming.

RetroShare is open source software for encrypted filesharing, serverless email, instant messaging, online chat, and BBS, based on a friend-to-friend network b…

Slack is a cloud-based team collaboration tool.