Nolan Chou

Sometimes we forgot change our file to a available name. So the plugin can help you auto change your upload file. 
I will add a filetype option of setting in next version. 
And a rename popup before the file upload if you change setting in future, default value is post_name.

wp_upload_rename

Change upload filename to random characters / random numbers / date / other by yourself.

ethanpil

<blockquote>
This plugin is an add-on for the <a href="http://gravityforms.com" title="visit the Gravity Forms website" rel="nofollow ugc">Gravity Forms Plugin</a>.
</blockquote>
Do you need to insert images into Gravity Forms HTML fields? Hate manually uploading and creating tags? Me too! Thats why I created this simple plugin for Gravity Forms which adds a button to every HTML field in the Gravity Forms form editor. Click the button and insert or upload an image using the standard WordPress media uploader.
Usage: 
1. Add an HTML field to your form. 
2. Click the new “Insert Image” button. 
3. Upload a new image or select an existing image. 
4. The tag is inserted into the HTML field at the position of the cursor.
Important Notes: 
I added an attribute to every tag of:
<pre><code>style="max-width:100%"
</code></pre>
This prevents large images for breaking the forms. You can easily remove it from the insert, but it shouldn’t break anything if you leave it.
Fork away: https://github.com/ethanpil/gravity-forms-image-in-html
This WordPress plugin is brought to you by <a href="https://www.angeleswebdesign.com" title="Los Angeles Web Design WordPress Experts" rel="nofollow ugc">Los Angeles Web Design</a>
Future Plans: 
1. Add Support for Gravity Forms WYSIWYG – https://wordpress.org/plugins/gravity-forms-wysiwyg/

Gravity Forms Image in HTML

Adds a button to Gravity Forms form editor HTML input field to insert or upload an image via Wordpress media uploader.

wp_upload_rename vs Gravity Forms Image in HTML