HyperText Markup Language: Introductions and Tutorials

Introduction to HTML

http://www.case.edu/help/introHTML/toc.html

HTML Cheatsheet (very useful resource)

http://www.webmonkey.com/webmonkey/reference/html_cheatsheet/

HTML Code Tutorial

http://www.htmlcodetutorial.com/

HTML Examples

http://www.w3schools.com/html/html_examples.asp

HTML - An interactive tutorial for beginners

http://www.davesite.com/webstation/html/

Teach Me HTML v. 1.6 (demo)

http://www.webmasterfree.com/teach.html

(Source: Claudia Bellusci, Blogging for Beginners, Message 1727: Some HTML Tutorials)