VirusTotal - VirusTotal is a free service that analyzes suspicious files and URLs and facilitates the quick...
Avira Browser Safety - FREE browser extension. Blocks harmful sites, protects your privacy and finds deals while you shop.
Hunter TechLookup - Create lists of websites by technology for free
Norton Safe Web - Safeguard against malicious URLs by scanning your feed using Norton Safe Web.
URLscan.io - urlscan.io is a free service to scan and analyse websites. When a URL is submitted to urlscan.io, an automated process will browse to the URL like a regular user and record the activity that this page navigation creates.
WOT Web of Trust - Check if a website is safe before you reach it via browser extensions, mobile app and API.