Lydia Watch - Pay for things with one tap on your Apple Watch
Ethereum Name Service - Like DNS, but for Ethereum wallet addresses
intoDNS - IntoDNS checks the health and configuration and provides DNS report and mail servers report.
Have I Been Sold? - Check if your email address was sold without permission
Dnsstuff - DNSstuff offers DNS tools, Network tools, Email tools, DNS reporting and IP information gathering.
PayID - It's like an email address for payments