Always available CTF Labs

I have identified the following CTF labs which are 24/7 and most if not all are free:

* CTF101:
Shellter Hacking Express:
* Backdoor:
* ShellWePlayAGame?:
* RootMe:
* OverTheWire:
* Virginia Cyber Range:
* Hack The Box:
* FuzzyLand:
* Hacking Lab:
* 365 CSAW:
* (good for people new to CTF):

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