AskApache Google 404 uses some ajax code and a few tricks to display a very helpful and SEO Error Page.
Composite Post allows you to create posts and pages composed of other posts/pages/all posts in a category.
NoFollow Free removes the “nofollow” tag from your WordPress blog’s comments and provides the option to insert a “NoFollow Free” band at the top of your blog.
PHPInfo gives you important information from your server configuration for posting at various WordPress support forums.
Related Posts generates a list of related posts via WordPress 2.3 tags and adds the related posts to your feed.
seekXL Snapr attaches a tooltip with a screenshot of the link target to every external link.
Shutter Reloaded is an image viewer for your website that works similarly to Lightbox, Thickbox, etc. with a file size of only 8KB.
SPGM Latest Galleries shows the latest galleries from your SPGM Gallery.
I guess there is a typo in your 4th paragraph (about PHPInfo plugin).
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Sudar
Great list. I think the Shutter Reloaded plugin looks like it has a lot of potential too so I might give that a try and replace Lightbox. š
Steve
I use Shutter Reloaded, appreciate the upgrade, and recommend for small size and quick viewing.
I’ll have to try the “No Follow Free” plug-in. I am a “do follow” blogger, but I don’t announce it. This might be a better way to attract the right type of people to post comments to my blog.