Michael Tumlad

Counts the title, content, and excerpt characters while you edit your post or page via the admin screen. Even counts the title characters while in Quick Edit!
Decon(structed) Character Counter is a real-time character counter
<ul>
<li>for title (post or page)</li>
<li>for content (post or page)</li>
<li>for excerpt (post or page)</li>
<li>for biographical info (user)</li>
<li>for Quick Edit title (post or page)</li>
</ul>
Works out of the box and seamlessly integrates with your WordPress admin dashboard so you can focus on writing.
Also comes with a real-time SEO-friendly reminder, just in case.

Decon Character Counter

Counts the title, content, and excerpt characters while you edit your post or page (even in Quick Edit).

Florian TIAR

Did you ever wanted to know how many signs (characters) you type in the content area?
It’s the perfect plugin for online newspaper that need to pay authors by the signs number of their posts.

Count Post Signs

Counts signs (characters and spaces) in real time while you are writing your content. Works for any kind of "post type" out of the box.

Decon Character Counter vs Count Post Signs