This is a list of the various code style guides I've printed out and (try to) abide by. There are endless style guides on the internet, these are just the ones I use wherever possible.
Markup:
CSS:
JavaScript:
PHP:
- PHP-FIG's PSR - https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-2-coding-style-guide.md
Python:
Java: