This plugin allows you to add highly customizable forms that work with your Wordpress Theme to your website that allows non-registered users and/or subscribers (also configurable) to submit and edit posts and pages.
Custom post types are one of the coolest features of wordpress 3.0, this is one of the plugins to make it easier to add them.
Another wordpress 3.0 plugin, not quite sure what this one does but it seems to be more specific to a widgeted area.
Plugin for adding custom post types to Word Press backend
WPTouch Pro is a wordpress plugin that detects if your visitor is coming from a mobile device and serves up a different theme
adds friendly permalink support, template files, and a new conditional for public, non-hierarchical custom post type archives in WordPress 3.0!
Plugin adds custom templates for Custom Post Type enabled posts
Summary of the most downloaded photography plugins
Plugin for embeding HTML5 Audio and Video