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.

aiwatech

In modern web designs, designers create different sizes of images on the web pages for attractive layout. If a web page is built using wordpress, a developer has to register every image size in theme to make sure, if client uploads an image of different size, it does not break the layout.
With a new WordPress installation, by default it creates three sizes e.g. thumbnail (150 x 150), medium (300×300), large (1024×1024) which means whenever a new image will be uploaded, WordPress will keep at least four copies of images on the server, one original image and 3 cropped image copies based on image sizes.
When developer/designer needs different size of image, they will register more image sizes e.g. hero, product thumbnail, product large image, team member image etc depending on design of the page.
Now lets say we have 3 default and 3 custom image sizes defined in theme, and now whenever a new image will be uploaded, WordPress will create 6 image copies and 1 original image even we need to use only 1 for a specific area on the website, remaining copies will remain on the server and will occupy space. Imagine when we have lots of posts, pages having different images, how many unnecessary images WordPress creates on the server which are useless and just eat server space. In case of Woo-Commerce website if you need to upload a new slider image for home page or a hero image for about page, it will create a lots of copies including different sizes of products image sizes which woo-commerce registers itself.
Ultimately website speed gets effected and server space as well.
To solve this issue, we built a plugin WP Image Sizes this plugin allows user to decide which image sizes should be created for every image being uploaded through WordPress.
After installing WP Image Sizes, it will create a setting page from where user can assign image sizes to each CPT. e.g. user can assign one size for hero/slider CPT, one size for team member, testimonials. After assigning image sizes to each CPT when user will upload a new image, WP Image Sizes will only allow WordPress to create copies of image sizes which were assigned to the CPT.
In case user tries to upload an image from a Media, it will show options in media uploader to select which image size user wants and WP Image Sizes will only create that image size.
WP Image Sizes plugin saves a lot of space on the server and plays a role to make WordPress website a bit fast.
<h3>PRO</h3>
WP Image Sizes plugin is also available in a professional version which includes more features <a href="https://aiwatech.com/product/wp-image-sizes-pro/" rel="nofollow ugc">See here</a>

WP Image Sizes

Select the only image sizes for post types you want to be generated. Eliminate unnecessary image sizes.

SimpleRecentThumbs vs WP Image Sizes