Sergey Biryukov

Allows to compare translations in different .mo files. Can be used by WordPress l10n teams to synchronize translations of WordPress, WPMU and WP.com.

Compare Translations

Allows to compare translations in different .mo files.

Converts gettext binary message catalogs to an array of strings. Allows to save some amount of RAM on a shared hosting server. 
Works with plugin and theme textdomains as well as with the default.
Thanks to AlexPTS for the idea.

Pure PHP Localization

Лучший и, скорее всего, единственный рабочий плагин. Спасибо, Сергей

Пожалуй, лучший плагин для кеширования переводов

Converts gettext binary message catalogs to an array of strings.

Compare Translations vs Pure PHP Localization