Zulip - Chat for distributed teams. Zulip combines the immediacy of real-time chat with an email threading model. With Zulip, you can catch up on important conversations while ignoring irrelevant ones.

GitHub Team Discussions - Now there's more space to talk through your projects 💬

Flow - Stop managing projects from your inbox.

gUmi - Manage infinite Git profiles in one click

Chatfully - Chatfully is one place for every chat.

Airgora - A visual community for physical product designers