not necessarily any good, i havent even tried most of them
http://wordpress.org/extend/plugins/advanced-category-excluder/
WordPress? Database Backup
http://wordpress.org/extend/plugins/wp-table-reloaded/
http://wordpress.org/extend/plugins/exclude-pages/
http://wordpress.org/extend/plugins/simple-tags/
http://wordpress.org/extend/plugins/tinymce-advanced/
http://wordpress.org/extend/plugins/ozh-admin-drop-down-menu/
http://wordpress.org/extend/plugins/wp-pagenavi/
http://wordpress.org/extend/plugins/ktai-style/ mobile interface
http://semperfiwebdesign.com/portfolio/wordpress/wordpress-plugins/all-in-one-seo-pack/ http://wordpress.org/extend/plugins/feedburner-plugin/ http://wordpress.org/extend/plugins/platinum-seo-pack/ http://wordpress.org/extend/plugins/tags/ultimate-tag-warrior
http://wordpress.org/extend/plugins/wordidentica/ http://wordpress.org/extend/plugins/oembed-provider/ http://wordpress.org/extend/plugins/tweetbackwp/
http://wordpress.org/extend/plugins/wordpress-popular-posts/
http://wordpress.org/extend/plugins/yet-another-related-posts-plugin/
http://wordpress.org/extend/plugins/delicious-cached/
http://delicious.com/help/linkrolls (not a plugin)
http://www.enthropia.com/labs/wp-lifestream/
http://wordpress.org/extend/plugins/backlinks/
http://wordpress.org/extend/plugins/wordpress-23-related-posts-plugin/
My Category Order
http://wordpress.org/extend/plugins/dingshow/ http://wordpress.org/extend/plugins/chatcatcher/
http://wordpress.org/extend/plugins/page-links-to/ http://wordpress.org/extend/plugins/my-page-order/
http://wordpress.org/extend/plugins/google-analytics-for-wordpress/
http://wordpress.org/extend/plugins/stats/
akismet
http://wordpress.org/extend/plugins/wp-security-scan/
http://wordpress.org/extend/plugins/secure-wordpress/ http://wordpress.org/extend/plugins/wp-recaptcha/
http://wordpress.org/extend/plugins/sociable/
http://wordpress.org/extend/plugins/add-to-any/
http://wordpress.org/extend/plugins/share-this/
http://wordpress.org/extend/plugins/addthis/
http://wordpress.org/extend/plugins/digg-digg/
http://wordpress.org/extend/plugins/simple-tags/ http://wordpress.org/extend/plugins/fixed-social-buttons/
http://wordpress.org/extend/plugins/disqus-comment-system/ http://wordpress.org/extend/plugins/intensedebate/
http://blog.jalenack.com/archives/democracy/
http://wordpress.org/extend/plugins/wp-postratings/screenshots/