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.

Steve Jones

Amber Hinds

Road Warrior Creative

Equalize Digital

Sometimes you simply want to allow users with the defined user role of “contributor” to upload images as they are writing blog posts. This plugin, when activated, automatically gives contributors the capability to add media. This is a lite plugin, perfect for someone who only wants to modify this one role/capability in which case a larger roles and capabilities plugin would be overkill.

Enable Contributor Uploads

Easy plugin which adds the capability for contributors to upload images to their blog posts.

Multiple Editors vs Enable Contributor Uploads