OSINT and Bellingcat have been synonymous since founder Elliot Higgins started publicly sharing open source intelligence techniques that outperformed the likes of the CIA and MI6 - two of the most well funded intelligence services on the planet - in validating claims in the Syrian War. Well, Bellingcat have now conducted a survey on tools usage most popular by membership -
it’s well worth a look at what they are - some obvious applications to sourcing here.