joch

Gallery Creator for instance makes it possible to set a one-column gallery with 
medium sized images. This makes it very easy and fast to insert a large number 
of big images than doing these one-by-one.

Gallery Creator

Gallery Creator is a plugin which reveals hidden gallery settings in WordPress.

wpoets

Amit Kumar Singh

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.

Gallery Creator vs akWPLightbox