Mark Jaquith

Redirect Old Slugs allows you to change your post slugs without breaking your permalinks. People requesting the old link will be redirected to the new link. This all happens automatically.
Note that this functionality was brought into WordPress core for version 2.1, so this plugin is not needed. When you upgrade to WordPress version 2.1 or higher, your old slugs will be kept and will keep on being redirected without the need for this plugin.

Redirect Old Slugs

Allows you to change your post slugs without breaking your permalinks.

Sergey Biryukov

webvitaly

karevn

BArS

Dilip Soni

Converts Hindi characters in post, page and term slugs to Latin characters. Useful for creating human-readable URLs.
<h4>Features</h4>
<ul>
<li>Automatically converts existing post, page and term slugs on activation</li>
<li>Saves existing post and page permalinks integrity</li>
<li>Performs transliteration of attachment file names</li>
<li>Includes just Hindi characters</li>
<li>Transliteration table can be customized without editing the plugin itself</li>
</ul>
Based on the original Rus-To-Lat plugin by Anton Skorobogatov and Cyr-To-Lat by SergeyBiryukov, karevn, webvitaly.
Caution: this plugin will change your slug/permalink permanently Hindi to Hinglish, so you should know how to redirect porperly.

Hindi-To-Lat

Converts Hindi characters in post, page and term slugs to Latin characters.

Redirect Old Slugs vs Hindi-To-Lat