Khanh

(Beta) An extension of Fields, a custom field management plugin. PostLinks provides additional field types such as Series, PhotoLink and PostLink.
Three new field types:
<ul>
<li>PostSeries: link your posts into series and display them with the [series] shortcode, also it comes with 2 widgets</li>
<li>PhotoLink: to be added</li>
<li>PostLink: to be added</li>
</ul>

PostLinks

(Beta) An extension of Fields, a custom field management plugin. PostLinks provides additional field types such as Series, PhotoLink and PostLink.

Jeff Sherk

Adds 10 custom supplier fields to the General product data section of each product. Fields are Supplier Cost, Supplier Minimum Price, Supplier SKU, Supplier Description, Supplier Name, Supplier Address, Supplier Phone, Supplier Email, Supplier Location and Supplier Notes.

Supplier Data Fields for WooCommerce

this plugin is awesome ... needed these extra fields

awesome

Adds supplier fields to the product data section of each product.

PostLinks vs Supplier Data Fields for WooCommerce