Shodan is a search engine that can provide very interesting results from a vulnerability exploitation perspective. Shodan can be effectively used for finding weaknesses in all internet connected devices, such as webcams, IP devices, routers, smart devices, industrial control systems, and so on. Shodan can be accessed at https://www.shodan.io/.

The following screenshot shows the home screen of Shodan. You would need to create an account and log in in order to fire search queries:

As shown in the following screenshot, Shodan provides an out-of-the-box Explore option that provides search results belonging to the most popular search queries:

The following screenshot shows the search results for online webcams. The search results can further be classified based on their geographical location: