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.
Here is a hack to make b2evolution show the most viewed articles in the sidebar. It scans the existing hitlog, and is simple to install.
This Search & Replace Plug-in intends to search for a given strings into a displayed post's content and replace them with other strings. It's a common Search & Replace mechanism applied to all the displayed b2evolution (0.9.0.x, 0.9.1) posts.
Bad Behavior is a set of PHP scripts which prevents spambots from accessing your site by analyzing their actual HTTP requests and comparing them to profiles from known spambots. It goes far beyond User-Agent and Referer, however. Bad Behavior is available for several PHP-based software packages, and also can be integrated in seconds into any PHP script.