https://validator.w3.org/#validate_by_upload - This page validates your HTML code.

http://jigsaw.w3.org/css-validator/ - This page validates your CSS code.

http://beautifytools.com/javascript-validator.php - This page validates your JavaScript code.

I've noticed through a few sites being shared that there are some errors that would be caught if their sites would put through an online validator. We need to remember as developing web developers sometimes a page will render as we expect it to, but it might still be littered with errors. For example, a face in a paper bag moment for me was commenting on someone's page, and then putting my page through a validator and finding some pretty silly errors in my CSS syntax. The page still rendered fine so I didn't think anything of it, but it definitely needed work.

http://student.athabascau.ca/~davidbo56/

Feel free to critique my pages code. 

I haven't submitted Unit 5 yet, but it is pretty much done at this point. Even though I operated a website years ago, I have learned so much in such a short period of time and I am really enjoying it. In particular, I am loving unlearning bad habits, and learning how to build websites the right way.