Tools/Utilities for standard/quality  code are :

  1. HTML Validator

    1. W3C HTML validator

    2. Dr. Watson

  2. CSS Validator

    1. W3C CSS validator

  3. Run CSS Lint

    1. Run CSS Lint online

  4. Run JSLint/JSHint

    1. Run JSLint online

    2. Run JSHint online

  5. World ready

    1. W3C i18n checker

  6. Automated Testing

    1. Testomato