FizTool

Fiz Auto Media helps site owners manage common media and publishing tasks from one plugin.
Developed By FizTool. 
Plugin website: https://fiztool.com/
Main features include:
<ul>
<li>Image compression and WebP generation for supported media files.</li>
<li>Bulk compression workflow for existing Media Library images.</li>
<li>Automatic image alt text and description helpers.</li>
<li>Featured image tools for posts without thumbnails.</li>
<li>Duplicate post detection tools.</li>
<li>Auto post scheduling tools using WordPress cron.</li>
<li>Media cleaner tools for scanning and reviewing unused media before cleanup.</li>
</ul>
Fiz Auto Media runs locally inside WordPress and does not require an external account for its included features. If the Featured Image helper is enabled, WordPress may request external image URLs found in post content so those images can be imported into the Media Library after the required upload and edit permissions are confirmed.
The plugin uses WordPress capabilities, nonces, sanitization, escaping, and WordPress filesystem helpers where appropriate.

Fiz Auto Media

Compress images, bulk schedule posts, review duplicate posts, scan unused media, and improve image metadata from one dashboard.

sdesalas

This plugin allows your WordPress blog to output pages compressed in gzip 
format if a browser supports compression.
HTTP compression generally means a 60-80% REDUCTION in the size of your pages 
(broadband usage) as well as an INCREASE in download speeds of 3x to 4x.
To test if your blog is using compression use the following link:
http://ismyblogworking.com/
Check “Page GZip” on the right hand size. 
Check “Bandwidth saved by compression” on the left hand side.
NOTE: This plugin should not be used alongside WP Super Cache or WP Cache 
since those plugins are already implementing compression. Your blog 
will keep working but those plugins will stop caching new pages.
RECENT NEWS – 20 March 2010:
Its been reported by a user that there is a conflict 
using WP HTTP Compression together with Google Analytics Plugin (3.2.5). I’ll 
to look into this and release a patch for next release. 
Note that this conflict is NOT with Google Analytics itself but with 
the PLUGIN. Google Analytics scripts and stat collection have been tested 
and work fine with the WP HTTP Compression plugin.

WP HTTP Compression

This plugin allows your WordPress blog to output pages compressed in gzip format if a browser supports compression. HTTP compression generally means …

Fiz Auto Media vs WP HTTP Compression