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Backwards-Compatible Spam and Delete Buttons for WordPress
Add Spam and Delete buttons right to the comments for WordPress installs below 2.6.
Disabling the update nag
Removes that nagging “WordPress [Version] is available! Please update now” message from your admin area.
Add Your Website to Firefox’s Search Bar Using OpenSearch XML
The ability to search right from your browser’s address toolbar [...]

WordPress Image Browser Extender is a plugin that will your to easily browse your images that are already uploaded to your website, select all the ones you want to add to your post or page, the structure you would like to use and then it inserts all appropriate syntax.
Installation is the same as another plugin:

Unzip [...]