• http://validator.w3.org
• https://validator.nu/
• https://html5.validator.nu/

• http://www.w3.org
• http://www.w3c.hu
• http://www.w3schools.com/html
• http://whatwg.org

WP:

• http://en.wikipedia.org/wiki/Web_Hypertext_Application_Technology_Working_Group
• http://en.wikipedia.org/wiki/Html5
• http://en.wikipedia.org/wiki/HTML

Webmestereknek:

• http://support.google.com/webmasters/?hl=hu
• http://support.google.com/webmasters/bin/answer.py?hl=hu&answer=35769&topic=2370419&ctx=topic#2

Átirányítások:

• http://en.wikipedia.org/wiki/URL_redirection

Favicon:

• http://www.w3.org/2005/10/howto-favicon

Az első HTML oldal:

• http://info.cern.ch/hypertext/WWW/TheProject.html

• http://www.bennewitz.com/bluefish/stable/binaries/win32/ (Bluefish)
• https://netbeans.org/downloads/ (NetBeans)
• http://www.flos-freeware.ch/notepad2.html (Notepad2)

• http://www.standardsmode.hu/html-css/oldalfelepites/
• http://phrogz.net/css/WhyTablesAreBadForLayout.html
• http://colintoh.com/blog/display-table-anti-hero
• http://www.smashingmagazine.com/2009/04/08/from-table-hell-to-div-hell/
• https://www.hotdesign.com/seybold/everything.html
• http://www.w3schools.com/html/html_layout.asp
• http://www.csszengarden.com/

• https://yoksel.github.io/html-tree/en/
• https://software.hixie.ch/utilities/js/live-dom-viewer/
• https://javascript.info/dom-nodes

• http://diveintohtml5.info/ (HTML5)
• http://it-ebooks.info/book/415/ (HTML5 elektronikus formában is)