Vulnerability databases
https://vulnerability.circl.lu 🇱🇺
https://vuldb.com/ 🌎
Threat intelligence
https://www.shodan.io 🇺🇸
https://talosintelligence.com 🇺🇸
https://otx.alienvault.com 🇺🇸
Online AV
https://www.virustotal.com 🇺🇸
https://hybrid-analysis.com 🇺🇸
Website security
https://testing.nc3.lu 🇱🇺
https://mxtoolbox.com/ 🌎
https://www.ssllabs.com 🇺🇸
https://sitecheck.sucuri.net 🇺🇸