Some Wordpress plugins are often updated, which is good think. Plugins that are updated are 100% compatible with last Wordpress version and they also are the most secure possible. A plugin that has not been updated for a long time might not work with last Wordpress version and might create a security breach for you website.
Float Left Right Advertising can scroll up/down banner when user scroll page up/down. Support HTML, image, flash. Multi options
This plugin lets you create announcements (text and/or media) that are displayed in various places…
WPEC Related Products for WP e-Commerce uses information available within the Single Product template to display related Products.
A tiny plugin which allows you to add a log-in form to your wordpress blog.
Document attachment widget will display any related attachment, which has been attached to a page or post.