How about Wave?
O Reader! My Reader
Silvia Killingsworth

Yes, I do remember Google Wave, and I think it’s funny that it disappeared, because it seems a lot like Slack, and Slack is a thing now, or at least a going concern (as they say, or used to say, in the business world). Am I wrong? Have I created an imaginary version of Wave, that was a lot like the real version of Slack?