brokenlibrarian

SimpleRecentThumbs is a widget plugin that shows a list of thumbnails from recent posts with featured images, optionally filtered by a category. Other than setting up the widget details, no configuration is required.
The thumbnails are in a widget-standard unordered list. The widget CSS class is widget_recent_thumbs and the thumbnail links are class post_thumb.
Leaving the category field empty will have the widget use thumbnails from all posts; posts without featured images will not be listed. Without a category specified, the “more” button option will do nothing.
Thumbnail size is as specified in the Media settings for WordPress.
SimpleRecentThumbs has no extra requirements and has been tested with the twentyten through twentyfourteen themes.
Development on this plugin has halted. Other developers should feel free to use the Apache-licensed code for their own projects.
http://brokenlibrarian.org/tinyplugins/ 
brokenlibrarian@gmail.com 
09/28/14
<h3>License</h3>
Copyright 2014 Christian Wagner
Licensed under the Apache License, Version 2.0 (the “License”); 
 you may not use this file except in compliance with the License. 
 You may obtain a copy of the License at
<pre><code> http://www.apache.org/licenses/LICENSE-2.0
</code></pre>
Unless required by applicable law or agreed to in writing, software 
 distributed under the License is distributed on an “AS IS” BASIS, 
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
 See the License for the specific language governing permissions and 
 limitations under the License.

SimpleRecentThumbs

SimpleRecentThumbs is a widget plugin that shows a list of thumbnails from recent posts with featured images, optionally filtered by a category.

fahrirusliyadi

WordPress generates thumbnails in the same directory with the original image. This plugin change this behavior by generating the thumbnails in a separate directory. The thumbnails will only be generated when they are needed and has not been generated.
This plugin will only move the thumbnails location for new uploaded images. To move all thumbnails, you need to delete all existing thumbnails (see FAQ).

Fr Thumbnails Folder

Move thumbnails file location to {$upload_path}/thumbnails or {$upload_path}/sites/{$blog_id}/thumbnails for multisite.

SimpleRecentThumbs vs Fr Thumbnails Folder