Internet Standards

HTML

www.w3.org/TR/html4 (PDF)
Charsets

SelfHTML v8.1
www.netzwelt.com/selfhtml

Beispiele und Referenztabellen
Symbolreferenz (gif)
jendryschik.de/
Emoticons Page

Box-Modell
Top 10 Design Fehler

robots.txt validator

XHTML

www.w3.org/TR/xhtml1 (PDF / index)
HTML und XML (PDF) die Sprachen im Web von Robert Tolksdorf
Nice comparison to HTML

javascript

Official ECMA reference

codepunk.hardwar.org.uk/index.htm
www.jalfrezi.com
Browserkennungen
EMailadresse als JavaScript

Page Speed Optimizing

Web Site Test Tools and Site Management Tools - Yottaa Website Assessment - UITest.com: Web Development tools
Web Page Analyzer - 0.98 - from Website Optimization - Google PageSpeed Insights

Apache mod-spdy

additional links

Website-Icons FAVICON - Gallery - Create FAVIcon from GIF

Google Webmaster Tools