Sergey Biryukov

Allows to get Russian translations for your plugins automatically from the <a href="http://code.google.com/p/l10n-ru/" rel="nofollow ugc">l10n-ru</a> project repository.

rurumo

Allows to get Russian translations for your plugins automatically.

pbosakov

This plugin will automatically transliterate permalink URLs when you save a new page or post with a title in the Cyrillic script. 
Romanization presets are available for all the major languages using the Cyrillic script: Russian, Ukrainian, Kazakh, Belarussian, Serbian, Tajik, Bulgarian, Kyrgyz, Bosnian, Mongolian, and Macedonian. 
The plugin can also romanize permalinks for any pre-existing posts, categories, products or other items with a title written in Cyrillic. 
Only UTF-8 encoding is supported.

Cyrillic Permalinks

Automatically transliterates Cyrillic letters in permalinks to their Latin phonetic equivalent. Multi-language. Can convert pre-existing permalinks.

rurumo vs Cyrillic Permalinks