tech-c.net

This plugin provides a contact form in order to send messages including file attachments. Optionaly, the contact form can be protected with Google-Recaptcha. To show the contact form, simply put the a shortcode in the text at the desired location on the desired page.

Contact Form by tech-c.net

Plugin that shows a contact form by shortcode.

tamlyn

Unattach is a very simple plugin which allows detaching images and other media from WordPress posts, pages and other content types.
As of WordPress 4.2 this functionality is built in. For previous versions, the only way to detach a media item from a post is to delete either the post or the media item. This plugin solves that by adding an ‘Unattach’ link below each media file in the Media Library admin list view.
<a href="http://outlandish.com/blog/2011/03/unattach/" rel="nofollow ugc">Plugin by Outlandish</a>

Unattach

Allows detaching images and other media from posts, pages and other content types.

Contact Form by tech-c.net vs Unattach