Plugin to remove featured images from posts?

I’ve seen some posts on the forums about this but they seem to be theme-specific … wondering if there is a plugin or code snippet that will allow me to have a featured image for a post (thumbnail) but not have that image appear at the top of my actual post.

I’m using the Healthpress Theme and there are thumbnails for different posts types throughout the website, so it would need to be something that allows for post thumbnails that appear not just on the homepage.

Also, is there a on/off feature or something where I could choose whether or not to include the thumbnail in the post?

Thanks for any help.