I've previously run with a #standup channel in Slack for distributed teams, where everyone makes sure there's an update in-channel at 0900 GMT of what they did in the preceding time they worked.

Plus an #achievements channel where you make a note of anything you did that was significant (I've also heard this called #whathappened)

I'm doing some consulting on the side (while starting https://getctx.io) and at this client we have a daily physical standup with a video call on Zoom, plus #achievements in Slack.