WP Plugin Uploader lets you upload plugins to your blog.
WP-ExternalFeed displays links from del.icio.us, Technorati and Reddit that is relevant to the current category of your blog.
WordPress Shop creates a fully featured shopping cart that currently allows paypal as a payment provider.
Link Harvest is a WordPress plugin that uses the content in your posts and pages to build a links list for you, based on the sites you actually link to.
SocialList is a WordPress plugin that adds a page to your admin area allowing you to view details on submissions of your pages to social bookmarking sites.