Spider for Bucket Name Enumeration
LolrusLove is a Spider for Bucket Name Enumeration (AWS S3 Bucket, Azure Blob Storage, etc...).
I often find that many bucket names are sufficiently obscurely named that I often need to find at least one valid bucket name via this spider before I am successful in finding sensitive information.
Once a valid bucket name is found, guessing other valid bucket names (i.e. altdns) is often trivial.