Basecamp is a project management web app.

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

eXo Platform is an open source, standard-based, Enterprise Social Collaboration Platform.

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.

Google Groups is a service from Google that provides discussion groups for people sharing common interests.

Grape is an REST-like API framework for Ruby. It's designed to run on Rack or complement existing web application frameworks such as Rails and Sinatra by prov…

Discord is a freeware proprietary VoIP application designed for gaming communities.

Fleep enables communication within and across organizations, be it your team chats, project communication or 1:1 conversations.

Flowdock is a group chat for teams which integrates with GitHub, Jira, Trello.

Glip is fully searchable, real-time group chat; video chat, task management, file sharing app.

Hack Chat is a minimal, distraction-free chat application.