Top Level Categories allows you to remove the prefix before the URL to your category pages.
Cardioblog it is a simple plugin for wordpress who shows in a graph of bars the whole of post writings in the month in course.
import_wordpress allows you to import posts and linked files from a WordPress site to another WordPress site.
babel allows you to write your blog in multilanguage, and switch between these with a simple click on a flag.
HeadSpace2 allows you to add meta-data to your posts, pages, search results, archives, and categories. Meta data is added via a GUI, or can be automatically extracted from post content. Also allows modification to page titles, blog name, and per-post themes.
Cimy User Extra Fields lets administrators add extra user fields for additional user details.
MTW Word Count Counts words in a post, making it possible to display that word count on a page (along with date, author, category, etc.).