Display upcoming posts in a widget.
Simple show future posts.
Display scheduled/future posts list on your WordPress dashboard. Require WP 2.7 or above.
Lets you show Future or Schedule Post on Single Posts. It also enables comments for future posts.
A nice plugin which creates a widget which shows your scheduled posts or drafts with excerpt and more infos.
The Vent plugin allows you to use the WordPress Scheduled posts functionality to enter,list and manage events.