WordPress developer links

Here are some useful links:

WordPress Codex:
http://codex.wordpress.org/Main_Page

Plugin API/Action Reference:
http://codex.wordpress.org/Plugin_API/Action_Reference

WordPress.org Forums:
http://wordpress.org/support/

WordPress Planet:
http://planet.wordpress.org/

Plugin Directory:
http://wordpress.org/extend/plugins/

Make WordPress:
http://make.wordpress.org/

WordPress TV:
http://wordpress.tv/

WordPress Answers:
http://wordpress.stackexchange.com/