Tizionario

FlickrPhotogallery allows you to insert one (or more) image gallery (retrieved from Flickr) into your posts using a shortcode; 
You can also use the built-in widget to insert the gallery into the sidebars.
The plugin allows to retrieve: 
* Public images 
* User-specific images 
* Photoset-specific images 
* Group images
It is also possible to choose to show the image gallery as an unordered list or as a slideshow, in this case you can select the dimension of it.

FlickrPhotogallery

This plugin allows you to insert an image gallery retrieving images from Flickr.

portablecomp

Want see all images from your DropBox Public folder? 
Want show your readers your recent photos in sidebar gallery of your blog? 
It’s fast and easy way to show your photos from any event in your life:
<ul>
<li>Last party</li>
<li>Vacation</li>
<li>Family holidays</li>
<li>Pets</li>
<li>Cars</li>
<li>and any pictures you want to public</li>
</ul>
Now any important images can be viewing in minutes!
Before ShowBox installation:
<ol>
<li>Launch your DropBox</li>
<li>Click on DropBox tray and select “Open Dropbox folder” </li>
<li>Open your Dropbox “Public” folder</li>
<li>Open your explorer </li>
<li>Drag and drop images you want to show from your explorer to your Dropbox “Public” folder</li>
</ol>
Five easy steps::
<ol>
<li>Open your blog admin widget page: http://yourblog.com/wp-admin/widgets.php 2. Open ShowBox widget 3. Click on “Log in to Dropbox” button. Then you’ll be redirected to Dropbox site</li>
<li>Please enter your Dropbox login 
 5. After you ‘ve been logined successfully, please open your blog main page http://yourblog.com</li>
</ol>
And let all your readers estimate what ‘s important for you. That’s all. Enjoy!

ShowBox

Any images, photos, pictures from your DropBox Public folder now are accessible to view in sidebar gallery of your blog.

FlickrPhotogallery vs ShowBox