✓ Re-verified August 2026: Flexible Checkout Fields by WP Desk is actively maintained (updated August 2026; 80K+ installs) — free version plus PRO from €59/year.
This is one of the best WooCommerce checkout plugins available. It enables you to customize the checkout page, remove/add custom fields, and also set the order of the fields. Moreover, with this plugin, you can also change the field type, such as checkbox, date field, and color picker, although that is limited to the Pro version.