Here's a polyglot that's valid in a large number of languages: https://github.com/mauke/poly.poly https://github.com/mauke/poly.poly At least the following:

Here's a polyglot that's valid in a large number of languages: https://github.com/mauke/poly.poly https://github.com/mauke/poly.poly At least the following: * C (89) * C (99) * C++ * Haskell (multiple extensions, not sure how that works) * Bash * ZSH * Posix SH * Make * Perl 5 * Perl 6 * Ruby * Python * Brainfuck * HTML edit: formatting