Helen Hou-Sandi

Really Simple Gallery Widget adds a widget to display images from the Media Library, no extra uploading or creating custom post types required. You can choose to show images from a specific post/page, the entire media library, or a specific set of attachment IDs. On single pages/posts, you can also show only images attached to the item currently being viewed. Especially helpful if your galleries are based on what’s attached to a post and you want to be able to easily display those images in a widget area.
<h4>Features</h4>
<ul>
<li>Add as many widgets as you want, wherever you want</li>
<li>Display images from a specific post/page, the entire Media Library, or a specific set of attachment IDs</li>
<li>Display images from the post/page currently being viewed</li>
<li>Select a number of images</li>
<li>Select any registered size in WordPress</li>
<li>Display the images in various orders</li>
<li>Show or hide captions</li>
<li>Link the images to the original file, post, anchor in the post, attachment page, or nothing. NOTE: If the image is not attached to a post, the file link will be used instead of the post or anchor in the post.</li>
<li>Add a prefix to the link and image title (appears as a tooltip)</li>
<li>Use a rel attribute for the link – great for lightboxes</li>
</ul>

Really Simple Gallery Widget

Simple widget for displaying images from the Media Library with plenty of configurable options.

misiek303

Plugin allows you to add photo albums to your site using media library from your wordpress.
Once album is created from administration menu it creates page or post using template or category. 
It means each album has own page or post depend what you will select, also it means that you can specify your own template.
Possible to add multiple albums on existing page or post content using syntax example: 
 [mpa:id=?] where ‘?’ is id of the album.
Possible to add all albums as widgets
Supports mysql and sqlite.
BUG FIXING:
FOR 1.4.3 – – 5/25/2009
<ul>
<li>fixed link to medium image for widgets</li>
</ul>
FOR 1.4.2 – -4/17/2009:
<ul>
<li>fixed widget formating to better fit in wordpress css</li>
</ul>
FOR 1.4.1 – -2/20/2009:
<ul>
<li>made all albums available as widgets</li>
<li>fix formating </li>
</ul>
FOR 1.4 – -2/20/2009:
<ul>
<li>Fixed some formating</li>
<li>Added more style to images</li>
<li>Modified albums list to generate syntax for you</li>
<li>added screenshots here</li>
</ul>
FOR 1.3 – 02/20/2009: Fixed bug during displaying multiple albums on the same post/page
FOR 1.2 – 02/13/2009: Sorry for everybody I copied wrong old files into, so below problems should be fixed.
<ul>
<li>problem to set correctly a plugin path</li>
<li>problems with adding correctly tables</li>
<li>saving a data</li>
<li>displaying information</li>
<li>fixed bug in syntax with whitespaces</li>
</ul>

Misiek Photo Album

Plugin allows you to add photo albums to your site using media library from your wordpress.

Really Simple Gallery Widget vs Misiek Photo Album