Lately I've been managing quite a few servers across the globe for my video saas
Maclock (premium) lets you unlock your Mac with the touch ID of your iPhone.
With nCognito (open-source) you can go to any café and join the WiFi as a completely new customer. Each time you'll have a different fingerprint.
health-check-slack (open-source) is a little tool made to inform you whenever a health-check fails through your slack! Unlimited health-checks included!