GitHub - CMB2/CMB2: CMB2 is a developer's toolkit for building metaboxes, custom fields, and forms for WordPress that will blow your mind.
GitHub - humanmade/Custom-Meta-Boxes: Lets you easily create metaboxes with custom fields that will blow your mind.
![How to make custom taxonomy into drop down select in a custom metabox - WordPress Development Stack Exchange How to make custom taxonomy into drop down select in a custom metabox - WordPress Development Stack Exchange](https://i.stack.imgur.com/01G6h.jpg)