TuniLame

You will be able to configure the color, size, link and link’s target of each button and even add a defaut button for many posts. 
To use it, just take a look on the plugin’s configuration page which contains all the informations and settings for the default button. 
Add the button by using <code>[button color= size= link= target=]text that will be shown as button's value[/button]</code>
Attributes that can be used: 
* color: There is 7 different colors: pink, magenta, green, red, orange, blue and yellow 
* size: There is 4 different sizes: small, medium, large and super 
* link: The link of the button. Example: Your site’s URL http://mysite.com 
* target: The link’s targeted window, can be: blank, new, parent, self or top 
Exemple: <code>[button color=blue size=super link=http://twitter.com/tunilame]Follow me![/button]</code>
Simply add <code>[button]</code> in you posts when you want to use the defaut settings.

CSS3 Buttons

Add coloured CSS3 buttons on your posts using simply a shortcode.

Jose Canchila (Jodacame)

Animated Buttons with CSS3 for you to use in your post, you can use them to download buttons, buttons for hyperlinks (links), or for whatever you want =)
 
<h4>Features:</h4>
<ul>
<li>Colors: Blue, Orange, Grey and Green</li>
<li>Sizes: Small, Medium and Large</li>
<li>Auto width</li>
<li>Shordcode</li>
<li>Button on your panel</li>
<li>Animation </li>
</ul>
Botones animados con CSS3 para que los uses en tus post, puedes usarlos para botones de descargas, botones para hipervinculos (links), o para lo que quieras =) 
 
<h4>Caracteristicas:</h4>
<ul>
<li>Colores: Azul,Naranja, Gris y Verde</li>
<li>Tamaños: Pequeños, Medianos y Grandes</li>
<li>Ancho auto</li>
<li>Shordcode</li>
<li>Boton en tu panel</li>
<li>Animacion </li>
</ul>
<a href="http://nexxuz.com/animated-buttons-with-css3-plugin-wordpress-para-generar-botones-animados.html" rel="nofollow ugc">DEMO</a>

Animated Buttons with CSS3

Animated Buttons with CSS3 for you to use in your post, you can use them…

CSS3 Buttons vs Animated Buttons with CSS3