Plugins

On iphone.wordpress.org and the iTunes AppStore it's possible to download the Wordpress Application by Automattic, which works on iPhone and iPad.

This plugin enables you to select which widgets appear on specific posts, pages, categories, author's posts and tag pages.

WordPress Plug-in Development (Beginner's Guide) focuses on teaching you all aspects of modern WordPress development.

An interesting list by 1stWebDesigner of tricks and hacks with new 2.8 Wordpress version.

A very useful plugin to check broken links in posts, pages, blogroll and (optionally) custom fields.

A common problem with autolink plugins is they break the image captions when finding a keyword in the description.