The Akismet plugin for b2evolution checks feedback through a central service ( http://akismet.com ) against spaminess.
The Live Hits plugin for b2evolution provides an automatically updating, live view of who is visiting your site. Paste in a Google Maps API Key (http://www.google.com/apis/maps/signup.html) for your domain and new hits will be added to a map.
This plugin is supported by the current release but needs some fixes
The Captcha Image Plugin allows you to use Captcha images for comments and user registration, as a measure against automatic spam attacks.
This plugin is no longer necessary for most users because similar functionality has been integrated into b2evolution's core. For more information, please see: Code Highlight Plugin
Display computer code easily and elegantly. This plugin renders character entities on the fly, so you can cut'n-paste normal code directly into your posts and it will always look like normal code, even when editing the post. No preprocessing. No hacks. Accepts BBcode tags and doesn't render smilies. Easy to install and easy to use.
We hope you like it. - the AM team.