maisdesign

It disable Post editor for Non Administrators and let you create posts only using Custom Fields (remember to configure them first!) 
It uses: if ( ! current_user_can( ‘install_plugins’ ) )
Actually there is no Admin Panel for this plugin if you would like to change minimum permission or role you’ll have to change it manually via FTP
<h3>Feature Request</h3>
Any feature request? Drop me a line: marco@maisdesign.it
This plugin is based on a conversation here: 
<a href="http://wordpress.stackexchange.com/questions/45113/how-to-disable-edit-post-and-allow-only-custom-field/45158#45158" rel="nofollow ugc">WordPress.Stackexchange</a>

Editor Remove

It disable default Post Editor and let users like Authors and Editors (not Admin) to write posts only using custom fields.

aThemes

vladff

The Sydney Toolbox plugin is meant to be used only with the Sydney WordPress theme.
This plugin registers custom post types and custom fields that are needed in the <a href="https://wordpress.org/themes/sydney/" rel="ugc">Sydney theme</a>

Sydney Toolbox

Registers custom post types and custom fields for the Sydney theme

Editor Remove vs Sydney Toolbox