Some have also described it as a search engine of service banners, which are metadata that the server sends back to the client.
SHODAN: Shodan also is not a tool, it is a search engine that lets the user find specific types of computers (webcams, routers, servers, etc.) connected to the internet using a variety of filters. Some of the sites included might require registration or offer more data for $$$, but you should be able to get at least a portion of the available information for no cost. The intention is to help people find free OSINT resources.
OSINT Framework This is not a tool but framework focused on gathering information using different tools available open source (over internet). Free Hacking tools for Information Gathering
