Most of the tools you need can be found at w3.org

HTML Validator - http://validator.w3.org/

CSS Validator - http://jigsaw.w3.org/css-validator/

Link Checker - http://validator.w3.org/checklink

Competitor Analysis can be found at http://www.ineedhits.com/free-tools/competitor-analysis.aspx or http://www.alexa.com/ (also good for a page ranking of sorts)

Calculate your  Google Rank http://www.prchecker.info/check_page_rank.php

Site grader:   http://website.grader.com/