Kaspars

Metronet AS

Plugin adds a meta box to every post, page and custom post type where users with editor capabilities can promote other users (with author or contributor capabilities, by default) as editors of that post.
Plugin provides the following filters:
<ul>
<li><code>custom_editors_enable_roles</code> — Specify an array of user roles which should be allowed to be promoted as editors of specific posts and pages. The default is: <code>array( 'contributor', 'author' )</code>.</li>
</ul>
A plugin by <a href="http://metronet.no" rel="nofollow ugc">Metronet</a>.

Multiple Editors

Allow multiple editors and contributors per post or page. Also enable contributors and authors to upload files and add new pages by default.

EvenFly Team

asifsaho

Spokesperson is a simple plugin for public blogs or any kind of WordPress driven site which can be used to show spokesperson/contributors information in widget areas.
If you want to show your sites contributor information then this plugin for you. Its nice graphical user interface will help you to show thier avater, email address, position and twitter profile by a few clicks. From the widget page in wp-admin you can handle this. For detail information regarding installation please see the “Installation” tab.

SpokesPerson

This is a little widget plugin for showing your blogs contributors name, email address, twitter…

Multiple Editors vs SpokesPerson