One of the best things about Slack, the workplace chat app that's seen phenomenal growth over the past year or so, is the way it lets other productivity tools hook in so that you can customize your workflow. Google services like Hangouts and Drive already work with Slack, and now there's another useful integration — Calendar.
You can set any calendar to post events to any channel at set times, meaning that Slack might just become the best way to get reminded of your schedule. It's an app that's hard to take your eyes off during the day, and it's easy to see how something like "Meeting with Nilay in 10 minutes" would slot right into the timeline of messages. It also might motivate me to figure out how to kill OS X's seemingly indestructible calendar alerts once and for all.