ZoomEye is described as 'search engine for Cyberspace' and is an website in the Online Services category. There are more than 10 alternatives to ZoomEye, not only websites but also apps for a variety of platforms, including Linux, Windows, Mac and Self-Hosted solutions. The best alternative is Metasploit. It's not free, so if you're looking for a free alternative, you could try Shodan or Censys. Other great sites and apps similar to ZoomEye are Armitage (Free, Open Source), Social-Engineer Toolkit (Free, Open Source), Exploit Pack (Free, Open Source) and Cobalt Strike (Paid).
Grabber is a web application scanner. Basically it detects some kind of vulnerabilities in your website. Grabber is simple, not fast, but portable and really adaptable. This software is designed to scan small websites such as personal sites, forums etc.