I would pay for this plugin

This plugin has made theme development easier and faster. Out of the box, this plugin is a rockstar and the few add-ons I’ve bought for it just make it that much better. The interface keeps getting better and easier. It helps make create robust, powerful themes and helps cut down on the use of widgets and widget control. This has been added to my list of plugins all sites I build will have. ACF along with Pods 2.0 and Gravity Forms gives you almost unlimited power to do whatever you want with a WordPress theme easily.