inner

<ul>
<li>English</li>
</ul>
This plugin convert to lowercase messages written completely in UPPERCASE
<ul>
<li>Espa?ol</li>
</ul>
Este plugin transforma a minusculas los comentarios enviados al blog que han sido escritos ENTERAMENTE en mayusculas.
<h3>Arbitrary section</h3>
<ul>
<li>English</li>
</ul>
In line number 13, You can set a warning message. It will appear below user’s comment.
If you don’t want any warning message to be appended, just set
define (“mensaje”, “”);
In line number 15, You can set the minimum number of message characters required for conversion
define (“minimo_caracteres”, “6”);
If You want to change fullLower function acording to your language, Visit this thread
http://es.php.net/strtolower
<ul>
<li>Espa?ol</li>
</ul>
En la linea numero 15 se establece el minimo numero de caracteres que ha de tener un mensaje para ser transformado. Establecido en 6. No se transformaran expresiones como “JODER”
define (“minimo_caracteres”, “6”);
En la linea numero 13 se establece la nota de aviso para el lector que aparecera en el cuerpo del mensaje. 
Si no deseas que aparezca ningun aviso, deja la linea de esta manera: define (“mensaje”, “”);
Otra opcion para que no aparezca ningun aviso consiste en borrar la linea n? 13 y borrar tambien la linea numero 36 ($devolver .= mensaje;)
NOTA: Los caracteres con tildes y otros como la ? quedaran en may?sculas tras las transformacion.
Puedes dejar tus comentarios en este hilo
http://blog.innerpendejo.net/2008/11/plugin-de-wordpress-para-pasar-a-minusculas-los-mensajes-escritos-enteramente-en-mayusculas.html
No obstante, dudo que realice modificaciones a peticion.

Mata Mayusculas – Kill Caps Lock

phillcoxon

Automatically format titles across your website include the browser title, on posts and pages, category and tag lists as well as in feeds.
This plugin catches common title case formatting mistakes by capitalizing each work in a title. As of version 1.5, users can also select a minimum letter count to capitalize (by default two letter words and smaller are not capitalized).
For example:
<ul>
<li>
“the quick brown fox” will appear as “The Quick Brown Fox”
</li>
<li>
“I love this plugin do you have more?” will appear as “I Love This Plugin do you Have More?”
</li>
</ul>
This plugin is maintained by Phill Coxon (http://phillcoxon.com) or you can find him on Twitter at http://twitter.com/phillcoxon/
This plugin is currently available in:
<ul>
<li>English</li>
<li>French</li>
<li>German</li>
</ul>
<h3>Updates</h3>
<h3>Donations</h3>
Open source software such as this free WordPress plugin only work through the hard work of community members, volunteering their time or resources to make the software freely available. If you would like to show your support for this software, please consider donating towards the development effort. http://phillcoxon.com/wp/
If you can’t contribute to the plugin in any other way, please consider translating it to your local language.
<h3>Original Developer</h3>
This plugin was originally created by Christopher Ross before being taken over by Phill Coxon in Jan 2016

WP Title Case

Automatically applied title case rules to WordPress titles. This plugin automatically updates Page and Post titles to follow title casing rules.

Mata Mayusculas – Kill Caps Lock vs WP Title Case