What's the name of the well-known (free) SEO site-crawler?

[gm66]

Had massive data-loss due to a win10 update recently, a scraping tool i ahven't used for years but want now that i've forgotten the name of, it was basic, HTML reports, generated MASSIVE spreadsheets due to the cross-referencing (many GBs) and was free ?

[littleman]

Screaming frog?
https://www.screamingfrog.co.uk/seo-spider/

[Adam C]

Xenu?

[gm66]

Xenu! Thanks Adam