ReflectionMedia

This plugin allows sorting of posts alphabetically, by Post Title (ascending or descending) or Post Date (ascending or descending), customizable for each category.

WP Post Sorting

This plugin allows sorting of posts alphabetically, customizable for each category.

SilbinaryWolf

Ultimate Metabox Tabs adds metabox tabs to your posts, pages and the Advanced Custom Fields options page. 
They allow you to easily allow tabbable and sortable metaboxes on your editing page so that your client can do less scrolling and more editing. 
They’re also inserted at server-time, meaning no ugly javascript forcing the metaboxes into the page.

Ultimate Metabox Tabs

Ultimate Metabox Tabs allows for keeping your post/page and ACF options user friendly for your client with the use of tabs.

WP Post Sorting vs Ultimate Metabox Tabs