Nike+ iPod Stats plugin for WordPress is a great way to display to the world how youâ€™re doing at your workouts. It uses Nikeâ€™s public API (the same one used for the official Nike widgets) to retrieve your personal data and formats it to display correctly on your WordPress blog.
Flog Maker is an entirely self-contained alternative flash blog system that resides within a WordPress plugin, designed for absolutely seamless integration with your WordPress installation.
altrugon dropdown categories gives you a function called
altrugon_dropdown_categories() which displays your categories in a drop down list and at the same time use the
onchange() event to submit the chosen category. (Site in Spanish)
Weather.com widget – shows forecast information for a city. Displays image related to current conditions.