Jatinder Pal Singh

This is a simple plugin which is designed to help the posters who some times forget to select the post category and post is published under default category. Once activated, this plugin will force the users to select post category while adding new post to wordpress site. Whenever User tries to publish a post without selecting category, it will give an alert to the user and also highlight the category selection area so that user can see from where to select the post category. 
Moreover, If poster hasn’t selected the category while clicking on publish button, it will save the post as draft under default, so no need to worry about loosing the post content in any case due to this plugin.

Force Post Category Selection

Just found this little gem of a plugin. Its so simple to use, literally just install then forget about it. I have two categories, and needed to make sure at least one of them was selected. This did the job perfectly. Thanks!

Install, then forget. A+

This is simple plugin which forces the users to select atleast one category from the list while publishing a new post.

Hansdeboeck

You can use this plugin to prevent your site from appearing in the server logs of referred pages as a referrer. The operators of the referred pages cannot see where their visitors come from any more.
For example, this plugin will automatically convert all external links to this format http://cube.hacemedia.be/url/?http://example.com.
This is an anonymous link to example.com which prevents the original site from appearing as a referrer in the log files of the referred page.
Information:
Reliability Hide the referrer from linked sites ? the ?Referer? header will always be blank.
Speed No waiting pages ? no slowdown.
No Ads Links are free of advertisements.
Security All traffic is encrypted using SSL.
(Based on the WP Blank Referer by blackhatzen)

Anonymize Cube

Anonymize all your external links with the Cube service.

Force Post Category Selection vs Anonymize Cube