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Challenge plugin for WordPress is available! Challenge restricts comment spam by throwing the commenter a challenge. The challenge and the answer can be user-defined, and can be of anything including PHP-evaluatable expressions. This plugin can also be used to ensure the commenter’s basic intelligence before he/she/it leaves a comment. The current version of Challenge is version 1.0.

Download and documentation are available here.

Challenge is under GPL and is available for free. You can download, use, modify, or keep in the back of your plugins directory in total disregard for eternity.

Please leave a comment here for bug report and additional support.

**Update: Version 1.1 is now available.