###DO NOT RUN THOSE SCRIPTS. ###THEY ARE FORK BOMBS FOR EDUCATIONAL PURPOSE ONLY!
Those are fork bombs examples, written in Bash, Javascript and NodeJS. Their goal is simply to crash a system by creating infinite loops.
In computing, a fork bomb (also called rabbit virus or wabbit) is a denial-of-service attack wherein a process continually replicates itself to deplete available system resources, slowing down or crashing the system due to resource starvation.
For more infos about fork bombs : https://en.wikipedia.org/wiki/Fork_bomb