There are tons of options out there. It really depends on what your looking to do. ithink your question may be a bit too broad. Make sure you take a look at the data resources section and check out the OSINT library we have. there are close to 200 entries currently. They are broken into 12 categories. Any site that you like can be bookmarked by checking the red start. This will create a link in your library in your profile for easy reference in the future. I hope this helps.