A customisable human detection plugin, that isn't annoying. Seriously.
Sick of annoying CAPTCHA plugins, that give your users a blurry image that even you can't read? Why not try I Am Human? Its a fully customisable grid based human verification technique, that you can make as easy, or as hard as you want. Not only that, you can theme it so it looks like your site, and make it fun to use! This isn't so much of a plugin, as it is a revolution!
How does it work?
When a user tries to submit a post comment, they will be presented a 'question' grid, like whats shown in the first picture within the screen-shots section. This is accompanied with a customisable description, which will explain what the user should do. The user then clicks on cells within the grid. When they do so, they change colour! Following the example within the screen-shots section, the user should click on the four cells within smilies left eye, turning them yellow. Because the 'answer' grid matches this, the test will pass and the comment will be posted!
How do I specify the grids? Is it hard?
No! Within the WordPress admin section, you can define your question and answer grids simply by drawing them yourself! The colours and text are fully customisable too.
See the screen-shots section for more details.
All this for free?!
Seems crazy I know, but yes, its totally free.