Scott DeLuzio

AMP-MODE

Debug Info will provide you with information on your current WordPress operating environment. This is a helpful tool for you or a developer to use when trying to identify the root cause of an error, or other issue you may experience.
Debug Info provides the following information:
<ul>
<li>
WordPress version currently running on the site
</li>
<li>
Current/active WordPress theme name, theme version, theme author, and theme URI
</li>
<li>
List of active plugins
</li>
<li>
PHP version
</li>
<li>
MySQL version
</li>
<li>
Apache version
</li>
<li>
Full phpinfo() server environment information
</li>
</ul>
Thanks to <a href="http://firstsiteguide.com" rel="nofollow ugc">Ogi Djuraskovic</a> for the Spanish (es_ES) and Serbian (sr_RS) language translations.

Debug Info

A plugin to display your server's PHP info and WordPress environment data for debugging purposes.

Sergey Biryukov

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.

Debug Info vs Pure PHP Localization