chitosystems/silverstripe-simple-captcha-field
Silverstripe spam captcha field 179
sunnysideup/comments_add_recaptcha
Adds Captcha to the comments module 158
hubertusanton/silverstripe-simplequestioncaptchafield
SilverStripe Simple question captcha field 13
mateusz/silverstripe-qacaptcha
Form field and validator to check for spam by asking user-de... 7