WhoisThisDomain - Domain name lookup tool that allows you to get information about domain registration from WHOIS server.

Exceptionless - Don't let your users walk away in frustration.

Whoisology - Connected database of whois records and whois history

Sentry.io - From error tracking to performance monitoring, developers can see what actually matters, solve quicker, and learn continuously about their applications - from the frontend to the backend.

WebCargo - Optimize your workflow by offloading it to us. Useful API's with seamless integration that scale to your needs.

RoRvsWild - All-in-one monitoring for Ruby on Rails applications. Track performances & errors for requests & background jobs.