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Allows multiple authors to be associated with a post. Co-authored posts appear on a co-author’s posts page and feed. Additionally, co-authors may edit the posts they are associated with, and co-authors who are contributors may only edit posts if they have not been published (as is usual).

The WordPress Plugin "Draft Control" allows users above level 5 to view drafts in a nice row paging system.

This plugin will show the last X posts by the current author either at the bottom of every post, or where you manually specify in each post. Using the built-in options page, you can choose the number of posts to show, set the header text, choose to show the post dates, select the format of the date, and choose whether or not to include the current post in the list.

A plugin allowing authors to get together to share ideas and tasks with a managable section in Wordpress administration section.

Plugin that sends comment notification to not only the specific author of the post, but to other authors of the blog as well. Customisable via admin panel.