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Achievements gamifies your WordPress site with challenges, badges, and points. Achievement notification List of user's unlocked achievements List of all available achievements Admin management screen showing a list of all achievements Crop of part of the "Supported Plugins" admin screen Crop of another part of the "Support Plugins" admin screen

Achievements for BuddyPress

http://wordpress.org/extend/plugins/achievements/screenshots/

CubePoints Buddypress Integration

http://wordpress.org/extend/plugins/cubepoints-buddypress-integration/screenshots/ Adds CubePoints support to Buddypress. Reward members using your BuddyPress portion of your website by giving them points and awards! Displays Points in the BuddyPress profile, donate link and rank with image, if enabled.
NOTE: Major changes between 2.0.x and versions 2.1 or later. Please see: http://wpbook.net/docs/upgrade/ for information on how to upgrade if you used 2.0.x previously. WPBook enables users to add your (self-hosted, not wordpress.com) wordpress blog as a Facebook application. http://wordpress.org/extend/plugins/wpbook/

WPBook

http://wordpress.org/extend/plugins/customize-your-community/ The Customize Your Community (CYC) Plugin for WordPress was conceived by Sugarrae will help you theme your backend WordPress pages using your existing WordPress theme and will not show obvious traces and branding of WordPress on the registration, lost password, login and logout pages to all users. Additionally, the CYC plugin will also theme profile.php pages for all registered users that are labeled as "Subscribers" in your administration panel as well as redirect "Subscribers" to their profile page upon login, bypassing and hiding the traditional WordPress dashboard". It also adds in the possibility to show a captcha on the registration form. More info: Changelog:

Customize Your Community

Mar 18 2010 Most bloggers would love to see more of a sense of community among the regular visitors to their blog. Sure, discussions sometimes take place in the comments of various posts, but it all seems a bit disorganized and they never really get off the ground. http://www.noupe.com/wordpress/building-community-sites-with-wordpress-15-plugins-to-get-started.html

Building Community Sites with WordPress: 15 Plugins to Get Started