There is an awesome article that goes over how one program can be written in different languages from the most abstract level of Math to Haskell to C to Assembly to actual machine code.
Awesome programming languages
Tour de Babel - Funny de tour of programming languages.
Programming Language Theory
Conal Elliott - Teaching New Tricks to Old Programs (2017)
Awesome static analysis - Curated list of static analysis tools, linters and code quality checkers for various programming languages.
Lists of most popular repositories for most favored programming languages
Rockstar - Idiomatic Rockstar FizzBuzz implementation is the best thing ever.