The document TYPO3 Extension Development is a guide mainly for extension developers, explaining the basic steps to create an extension and going further into advanced topics useful for TYPO3 extension development.
Mit dem Kickstarter eine Extension erstellen
t3-module development starting point
Die CMS Drupal, eZ Publish, Plone, Joomla und Typo3 im subjektiven Featurevergleich
TYPO3 - Version 4.0 freigegeben