Share a plugin or two that you find useful, and help fellow bloggers out.
I will start with a few
create icons for categories, good for niche categories on your blog
http://wordpress.org/extend/plugins/category-icons/
flash video player now support for skins
http://www.mac-dev.net/blog/index.php
allows for custom post templates much like the page templates, good if you want to dedicate a template for a paysite, ex: pornpros, you could have the template with a set of styles, images, etc.
http://wordpress.org/extend/plugins/...post-template/