What you get with this is a customizable (via the back office) plain text field that your visitors will have to fill in before they can leave a comment. Registered bloggers are exempt from the test, as are those who've successfully left a comment already. You will be able to customize the test and answer and rejection text in your back office.
Not really a plugin or a hack, but a how-to on setting up one installation of b2evolution that can be installed on many virtual domains at once.
This hack describes how to change the permalinks so that they appear without the dates. I.e. http://www.example.com/index.php/posttitle instead of http://www.example.com/index.php/2005/12/12/posttitle
SEO Keywords & Description Hack is a two-functions hack intended to help search engines to better index your posts. It makes possible to add post-specific (X)HTML page description and keywords list. If no post-specific information is given, the default blog-specific information is used instead.