kicom - KicomAV is an open source (GPL v2) antivirus engine designed for detecting malware and disinfecting...
Sucuri - Website Protection, Malware Removal, and Blacklist Prevention
Windows Defender - Windows 10 security delivers built-in & ongoing protections you can trust: Windows Defender Antivirus, firewall, family settings, ransomware protection, real-time protection & more. Stay up to date & protected at no extra cost.
Amazon CloudFront - Amazon CloudFront is a content delivery web service.
Amiti Antivirus - Effective and easy to use free antivirus for your PC.
CloudFlare - Cloudflare is a global network designed to make everything you connect to the Internet secure, private, fast, and reliable.