Skiptracer is an OSINT scraping framework that utizes basic python webscraping of PII paywall sites to compile information (passively) on a target. This is especially useful if you are operating on a very small budget.
LinkedIn2Username is an OSINT tool that generates username lists from companies on LinkedIn. What’s great about LinkedIn2Username is it’s easy to setup and doesn’t require an API key.
SearchBook is currently down as Facebook has made more changes to their graph search.