NerdKey

Powered by NerdTools.co.uk, this plugin will automatically and anonymously report the authors IP address for any comment that is classed as spam to the NerdTools Bad Bots Intrusion & Spam Detection database.
The Bad Bots database keeps track of hundreds of thousands of bots that try and exploit and spam servers and websites world wide which is then used in applications such as NerdTools Bad Bot Spam Defender which checks every comment authors IP address against the database to detect and prevent known offenders from causing further spam.
This plugin is simple to use, follow the installation instructions and you will be contributing in no time.
More information along with stats and the NerdTools Bad Bots Spam Defender plugin can be found at http://www.nerdtools.co.uk/badbots/.

NerdTools Bad Bots Spam Reporter

Automatically report spam comments to the NerdTools Bad Bots database. The authors IP address is sent anonymously to help understand and fight spam.

Powered by NerdTools.co.uk, this plugin will automatically and anonymously check the authors IP address against the NerdTools Bad Bots Intrusion & Spam Detection database.
If a match is detected no commenting will be allowed and a custom error message will be displayed instead, if no match is detected commenting will be allowed as normal.
More information can be found at http://www.nerdtools.co.uk/badbots/

NerdTools Bad Bots Spam Defender

Automatically denies comment access to known spammers in the NerdTools Bad Bots database.

NerdTools Bad Bots Spam Reporter vs NerdTools Bad Bots Spam Defender