eclev91

This plugin introduces a couple of nifty functions to replace <code>the_post_thumbnail()</code> & <code>get_the_post_thumbnail()</code> in exchange for the responsive <code>picture</code> element. Use:
<pre><code>get_the_post_picture(
 $fallback_image_size,
 array(
 $breakpoint_1=>$image_size_1,
 $breakpoint_2=>$image_size_2
 )
 [, $id, $atts]
);
</code></pre>
For example:
<pre><code><?php echo get_the_post_picture(
 'single-featured-sm',
 array(
 '(min-width:768px)'=>'single-featured-md',
 '(min-width:992px)'=>'single-featured-lg',
 '(min-width:1200px)'=>'single-featured'
 )
); ?>
</code></pre>
While this says 4.0 for minimum version, I would wager it’ll be fine on most older installations.

Picture Element Thumbnails

Get a picture element instead of an image tag for responsive images on your WordPress site.

Bishoy.A

By default, thumbnails of photos taken by an iOS device (iPhone or iPad) are flipped 90 degrees to the left, it’s a long image EXIF information story. This plugin takes care of this and fixes the uploaded images orientation’s (if needed, based on EXIF data) using ImageMagic Library if available or PHP GD as a fallback.
No settings editing required, just activate the plugin and try uploading an image from your idevice!

iOS images fixer

Automatically fix iOS-taken images' orientation using ImageMagic/PHP GD upon upload.

Picture Element Thumbnails vs iOS images fixer