Web Wiz CAPTCHA
Free CAPTCHA Security Image application that is simple to integrate with your existing web forms to protect against automated spam and brute force hacking. Unique Security Code Images produced on the fly to protect web forms from automated spam and bots. 100% ASP, no DLL's or Active X required! Easy to configure colours, noise levels, and distortion levels. ABBYY FineReader 9.0 Pro OCR was unable to detect security codes, in 5 hours of testing!