Stack sort
In a recent xkcd‘s alt text, Randall Munroe suggested stacksort, a sort that searches StackOverflow for sorting functions and runs them until it returns the correct answer. So, I made it. If you like running arbitrary code in your browser, try it out. — Gregory Koberger
gkoberger.github.io/stacksort/
Quine Relay
This is a Ruby program that generates Scala program that generates Scheme program that generates …(through 50 languages)… REXX program that generates the original Ruby code again. — Yusuke Endoh