Endless Posts Navigation is a great plugin to loop your posts/pages with alphabetic order. It is simple to use.
It automatically sense the post type where it is implemented and provide the endless navigation from the same taxonomy/category. You don't need to worry about its order. It automatically manage alphabetical order for next and previous navigation.
Author: Fahad Mahmood
License: GPL 3. See License below for copyright jots and tittles.
Visit my blog and suggest good features which you wana see in this plugin.