Posts are usually listed in reverse chronological order as they are often used for posting regular time-orientated content. 
postMash lets you customise the order your posts are listed in using it’s simple Ajax drag-and-drop administrative interface. Plus it gives quick access to toggle posts between draft and published states. Particularly useful if you’re using WordPress as a CMS. 
It now no longer requires any modifications to your template code. If you disable postMash your post will go back to your usual ordering.
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<h3>Localization</h3>
Currently only available in english.

postMash – custom post order

Customise the order your posts are display in using this simple drag-and-drop Ajax interface.

gunnettmd

Many WordPress authors will write stories over long periods of time, encompassing multiple posts. Creating links from post to post, page by page can be cumbersome and readers navigating to these related posts can sometimes be difficult to understand. With LinkMyPosts, you (the WordPress Author) can link all of your related posts into one ?book? and display a friendly link list to your users while they are reading a post. This link list will intuitively allow them to navigate to the next or previous page, as well as jump to the beginning or the end.

Link My Posts

Much like a person reading a book would flip the page, this plugin allows you to display an unobtrusive link list of pages in your story.

postMash – custom post order vs Link My Posts