I feel like there are a lot of businesses that could be built from doing high quality integrations like this. Specific custom integrations that work really well and setup easily (as opposed to IFTTT/Zapier where you have to search for the right thing, get API keys, etc).https://twitter.com/backus/status/988522263421964288 …
Closest thing is maybe Github and Slack integration marketplaces where you pick what you want, go through a little OAuth flow, then It Just Works™