Focused crawls are collections of frequently-updated webcrawl data from narrow (as opposed to broad or wide) web crawls, often focused on a single domain or subdomain.
Consolidating and extending hosts files from several well-curated sources. You can optionally pick extensions to block pornography, social media, and other categories.
This repository contains a list of all web sites I come across that are either hacked with or purposefully hosting malware, ransomware, viruses or trojans.