We are using Slack as our central, well, everything. We feed different slack channels. For example our dev channel gets: Github commits and pull requests, CircleCi tests, Heroku deployments and changes to out Trello dev board.

For other channels, like support, we push in intercom.io messages, heroku status updates, and a few other statuses.

We built a custom node module to send Streak updates to a channel as well.

It's awesome seeing what is going on in different parts of the company at any one time just by visiting a channel in slack.