Wordpress conditional tag reference. Good reading if you are customizing headers and sidebars.

Straightforward Wordpress sidebar page navigation widget.

Quoted: Flexi Pages Widget is sidebar widget for WordPress blogs. It displays a list of links to pages and sub-pages in the WordPress sidebar. Flexi Pages Widget is highly configurable and comes with plenty of options.

Using the new gallery feature in Wordpress 2.5.

Wordpress photo gallery plugin.

Quoted: ALEX RABE | learning by doing…

Quoted: The Loop is used by WordPress to display each of your posts. Using The Loop, WordPress processes each of the posts to be displayed on ...

This article goes through the steps for taking a plugin that you have created (see Writing a Plugin) and getting it distributed widely.

Writing your first Wordpress plugin.

Quoted: How to Write a Wordpress Plugin, written by Ronald Huereca is an extensive, twelve entry series on the process of creating your own Wordpress plugin. ...

Quoted: This post was written as part of the How to Write a WordPress Plugin series. More and more plugins are starting to use AJAX techniques. ...