gerbenvandijk

This plugin creates a widget that shows a gallery of all the images in a post.

Post Images Gallery

This plugin creates a widget that shows a gallery of all the images in a post.

Amit Kumar Singh

wpoets

Aim of this plugin was to create a simple lightbox, to be used with the images on the post, it helps you add your images as you do now, it will take care of rest of the things. It works transparently without adding any extra work on your part.
For more information check out the <a href="http://amiworks.co.in/talk/akwplightbox/" title="akWPLightbox : simple lightbox for wordpress" rel="nofollow ugc">plugin homepage</a>.
Tip: To keep track of this plugin’s evolution and features, you are advised to <a href="" title="Grab Amiworks RSS Feed" rel="nofollow ugc">subscribe to the author’s feed</a>

akWPLightbox

It makes all the image in a post that are linked to larger images, to open with lightbox effect.

Post Images Gallery vs akWPLightbox