Arefly

Check if the Email’s Gravatar is exist.
檢測指定郵箱的Gravatar是否存在
Example:
<pre><code>if(validate_gravatar("name@domain.com")){
 echo "This Email have Gravatar!";
}else{
 echo "This Email do not have Gravatar!";
}
</code></pre>

Validate Gravatar

Check if the Email's Gravatar is exist. 檢測指定郵箱的Gravatar是否存在

shawfactor

Make comments better for visitors by modifying the comment form.
This plugin adds some small hacks around core WordPress comment forms including:
<ul>
<li>Hide the url field (will be configurabel in future releases)</li>
<li>Makes all fields html5 compliant.</li>
<li>Make email, name and comment required fields on the front end via required attribute.</li>
<li>Make the comment textarea expandable for better use of space.</li>
<li>Hide the email and name fields until a visitor begins adding a comment.</li>
<li>Saves unfinished comments in localstorage for repeat visitors.</li>
<li>If the commenter doesn’t exists saves their details in the database with an unclaimed user role</li>
<li>Give each comment its own permalink</li>
</ul>

LH Native Comments

Make native WordPress comments better by using modern standards

Validate Gravatar vs LH Native Comments