TL;DR Email - Send short emails & read emails as fast as you read Facebook
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
mlist - Email newsletters, outside of the inbox
WhiteSource Renovate - Automate your dependency updates
Spark Mail - Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues
Allstar - GitHub app to set and enforce security policies