Backie

Allows users to edit the internal WordPress options without digging about the database. If you don’t know what that means or think it’s a better interface for configuring your WordPress install this isn’t for you. You will proably end up breaking your WordPress install. This plugin has a very limited use.
Requires PHP 5.2 or above

Option Editor

Allows users to edit the internal WordPress options without digging about the database.

Steve

Adds the ability to enter contact information and output the details in your posts, pages or templates.
Use the shortcode <code>[contact type="phone"]</code> to display any of the contact details, or use the function call <code><?php if ( function_exists( 'contact_detail' ) ) { contact_detail( 'phone' ); } ?></code>.
Once you have defined a contact email address, use the shortcode <code>[contact type="form"]</code> to output the contact form.
Languages: Also available in Español (Spanish) and українська (Ukrainian by Michael Yunat).

Contact Details

Adds the ability to easily enter and display contact information.

Option Editor vs Contact Details