No CAPTCHA reCAPTCHA Captcha replacement for e107 v2.1.3 or higher.
You should use this plugin on your own risk.
WARNING: this plugin is not used by developer anymore. Signup Secure plugin looks as better alternative.
You can support next development by donation on https://www.e107sk.com/
OLD VERSION
Available and supported version for e107 v0.7+ as curtesy by Spinning Planet: https://github.com/spinningplanet/recaptcha
Warning: You need to have allow_url_fopen enabled in your php settings. Thanks to René Schlegel for mention this. Tested with 2.1.8 (latest official release) Tested with 2.1.9 git and pho 7.2.4 and 7.1.16
Source and thanks:
https://github.com/e107inc/visualcaptcha
http://stackoverflow.com/questions/1241947/how-do-i-show-multiple-recaptchas-on-a-single-page