Form Captchas - Anti spam form protection

FormCaptchas.com is an online service that protects your forms against spam attacks and automatic submissions. This service has been designed to make the requirements as lower as possible and at the same time to provide all the security and features that a captcha must have, even including audio-captchas. The FormCaptchas service is visually configurable, easy to use and free for web sites with low traffic. This captcha is based on Ajax Scripts: you don't need to refresh the page in order to verify it; you can request a new captcha image without reloading the page and the filled fields don't need to be retyped again never.