Automattic developers have released a new version of Jetpack with a brand new feature named Carousel.
A major update of Carousel has also been released for the users of WordPress.com blogging platform.
Carousel enhances the support for image gallery feature on the WordPress blogs.
Instead of getting dedicated pages for individual images, you get a fully functional Lightbox.
Features (from the WordPress.com announcement):
Images are served double-resolution (Retina!) for visitors on capable devices, like the iPad 3 or Retina MacBook Pro. (Best, laptop, ever.)
Comments! Visitors can now comment directly on each photo.
Likewise, you can now like or reblog every individual image.
You can now select a light or dark theme for your photos to be showcased on.
If your camera includes EXIF metadata, like aperture, lens, and shutter speed, we now show that next to the photo. (You can toggle this off under Settings → Media if you prefer.)
We’ve improved performance so it loads and moves faster on browsers old and new.