Search engines for hackers

urlscan.io is a free service to scan and analyse websites. When a URL is submitted to urlscan.io, an automated process will browse to the URL like a regular user and record the activity that this page navigation creates.

LeakIX is a search engine indexing open hosts on the internet. It focuses on listing the databases and table names and keeps an history of every successful connection. New database software support is added on a regular basis.