vancho17

This simple plugin allows you to enhance custom fields with TinyMCE allowing your clients to add rich text content to any area of your site.
Features
<ul>
<li>Automatically upgrades textareas in custom fields to TinyMCE.</li>
</ul>

mceTextarea

This simple plugin allows you to enhance custom fields with TinyMCE allowing your clients to add rich text content to any area of your site.

51seven

This plugin adds a placeholder field into your Gravity Forms input and displays it as a proper HTML5 placeholder attribute without JavaScript (yaay!)
I took code from <a href="http://www.wpbeginner.com/wp-tutorials/how-to-add-placeholder-text-in-gravity-forms/" rel="nofollow ugc">this article from wpbeginner.com</a> and optimized it. Applause to them.

Placehold (Gravity Forms)

Adds a placeholder field to Gravity Forms

mceTextarea vs Placehold (Gravity Forms)