slickorange

This simple plugin enables you to set up different access codes or passwords that enable users to be added to specific WordPress Roles or Press Permit (http://presspermit.com/) permission groups.
Simply go to Settings -> WP Access Codes to create and manage your codes.
Use the [wp-access-codes] shortcode to display the input field in the frontend.
More features planned! Please make your feature requests in the support area or send a mail to info@slickorange.co.za

WP Access Codes

Assigns a WordPress Role or/and a Press Permit Group to a user based on a predefined access code they enter.

Viljami Kuosmanen

A simple way to control who can edit WordPress posts or pages.
Adds an Edit Permissions metabox to the post edit page, where you can select which users can edit the post.
Only applies to users of role editor.
Contributing
Please contribute to this project on Github. Pull requests welcome!
https://github.com/anttiviljami/wp-post-acl

WP Post ACL

A simple way to control who can edit WordPress posts or pages.

WP Access Codes vs WP Post ACL