Dall Dexter

ImgDexter helps WordPress sites optimize new image uploads automatically. It converts supported uploads to WebP, applies practical dimension limits, controls output quality, and records clear diagnostics so site owners can see what happened.
The free Lite edition focuses on everyday new-upload optimization:
<ul>
<li>Automatically process new supported image uploads.</li>
<li>Convert eligible JPG, PNG, GIF, and WebP images to optimized WebP output.</li>
<li>Limit maximum image width and height.</li>
<li>Control WebP quality.</li>
<li>Optionally crop portrait images to a practical ratio.</li>
<li>Skip very small images when needed.</li>
<li>Keep a simple diagnostics log for recent processing results.</li>
</ul>
ImgDexter Pro is available separately for existing-library processing, controlled batch workflows, professional media review, cleanup guidance, deeper diagnostics, commercial updates, and support.

ImgDexter

Smart WebP image optimization for new WordPress uploads.

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 …

ImgDexter vs WP HTTP Compression