No specific info about version 4.33. Please visit the main page of Slack on Mac Informer.
iMessage lets you send messages to anyone on a Mac, or an iPhone, iPad, or iPod touch running iOS 5.
Rocket.Chat is a Web Chat Server, developed in JavaScript.
Chromium-based web browser supporting integration with multiple web apps.
Send and receive messages and call quickly and securely around the world.
Java-based chat client. If you need to communicate with contacts on several public IM channels simultaneously and don't want to clutter your desktop..