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
Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
mlist - Email newsletters, outside of the inbox
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
TL;DR Email - Send short emails & read emails as fast as you read Facebook
Better Uptime - We call you when your website goes down