Malwarebytes - Malwarebytes protects you against malware, ransomware, and other advanced online threats that have made antivirus obsolete and ineffective. Free Anti-Malware & Malware .
Avira Browser Safety - FREE browser extension. Blocks harmful sites, protects your privacy and finds deals while you shop.
Kaspersky AntiVirus - Download the best FREE antivirus for Windows-based desktops, laptops, & tablets and get the core protection against viruses, spyware, phishing & dangerous websites.
Norton Safe Web - Safeguard against malicious URLs by scanning your feed using Norton Safe Web.
AdwCleaner - AdwCleaner is a free removal tool for : Adware (ads softwares)
WOT Web of Trust - Check if a website is safe before you reach it via browser extensions, mobile app and API.