Root Me
https://www.root-me.orgHack The Box :: Penetration Testing Labs
https://www.hackthebox.euNewbieContest
https://www.newbiecontest.org/Vulnhub
https://www.vulnhub.com/HackThis
https://www.hackthis.co.ukThe Enigma Group
https://www.enigmagroup.org/Hack This Site!
https://www.hackthissite.org/WebGoat: A deliberately insecure Web Application
https://github.com/WebGoat/WebGoat/wikiW3Challs : World Wide Web Challenges
https://w3challs.com