As a Slack App developer myself, I'm very curious to learn what really work for people. I went to multiple Slack events where they present use-cases from their customers, but all that stuff has gone through a good amount of marketing "improvements".<p>I'd like to ask the HN audience what REALLY works for you?<p>Here's a bit about what I use or I've seen being used:<p>- Trello notifications - even though trello sends me a load of push-notifications, #trello-update is somehow the first place where I look.<p>- HubSpot live chat - Replying to live chat discussions right from Slack is 10x easier than opening the app<p>- Jenkins, Sentry, Rollbar alerts - of course<p>- Standuply - we don't really use it in my current team, but I've seen it being adopted at my previous workplace so I'll leave it here.