
Well thought out...
And really easy to use, using it on every site now...
Review by erikfreelock on May 13, 2008 - 17:07

Kill the Spammers
Created by Fabiano 'Wundo' Sant'Ana, The CAPTCHA module is great for stopping spam posts and automated account creation on a Drupal site. It gives you the ability to set a CAPTCHA on any Drupal form, which has come in handy on this site as I have been receiving emails similar to this recently:
W09zxA <a href="http://khffvokqjfyd.com/">khffvokqjfyd</a>,
[url=http://comysmauwhce.com/]comysmauwhce[/url],
[link=http://ccfthzcigekg.com/]ccfthzcigekg[/link],
Looks like some one is testing their blog spam script. Anyway the CAPTCHA module helps stop this by requiring users to enter either the alphanumerics displayed in a picture or by asking a question such as
'What is the fifth word in the phrase "yasev iko epeha huvo usa"?:'.
The image-based CAPTCHA has a variety for options as to what it shows. You can set the following:
- Characters to use
- Length of the code
- Font (you need to upload a .ttf file to use a custom font)
- Font Size
- Character spacing
- Distortion Level
- Smooth distortion
- Double Vision
- Add salt and pepper noise
- Add line noise
- Noise Level
The great thing about this is that you can make your CAPTCHA images unique, and therefore harder for these guys to crack! The CAPTCHA module is available for Drupal 4.7, 5 & 6, and is still in active development.
Review by samhassell on May 6, 2008 - 05:48

Perfect little module, essential!
The module is very easy to use and install. This is an essential feature. The math captcha is possibly even "fun".
Review by heather on April 27, 2008 - 04:10

A very well thought-out module
This module has a lot of little features that make it great. The ability to add captchas to any form is really useful.
The true strength of this module lies in the fact that it provides an API for other modules to plug into. This means you can extend it to provide many different types of captchas.
I suggest checking out Captcha Riddler, it's a great addition to this module.
Review by John on April 19, 2008 - 21:41