Approved - The better way to get approvals, right inside of Slack
Heroku CI - Continuous Integration from Heroku
Approve app for Zendesk - Any enforceable and auditable approval workflow for Zendesk tickets you can imagine can be easily created using the Approve app.
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
ApproveIt for Slack - Get approvals in minutes, not days. Right from Slack!
Tosin - Initialize a npm package with CI, documentation and more