BGtoLAT converts Bulgarian Cyrillic characters in post title to Latin characters. Very useful for Bulgarian users of WordPress.
d4rss is an RSS Aggregator plugin that allows to display rss entries from external rss sources of your choice. RSS entries are updated once a day using WordPress Cron API.
MiniMeta Widget adds a contact form to your sidebar and allows you to enable or disable links.
Mother Approves Vote Button adds an external Vote Button on individual posts on your blog that allows readers to ‘Approve’ your post at MotherApproves.net (A Digg for Parents) right from your individual post with a user-friendly graphical vote button.
Plastic Tunes allows your blog to display and collect informations about the music you play in your media player.
Slideshare.net Slideshows for WordPressMU lets you add slideshows to your WordPressMU blogs.
Text Link Ads for WordPressMU allows WPMU users to use the TLA basic service and earn money. On the other hand, WPMU operators can earn money by joining the TLA affiliate program and refer their users to the service.
wp-wishlistr allows you to vew your wishlist from wishlistr.com in your WordPress installation, either on a page or in a post.