A captcha (an acronym for completely automated public Turing test to tell computers and humans apart) is a type of challenge-response test used in computing to determine whether or not the user is human.

Mondor CAPTCHA control is used in user registration and other input forms to prevent automatic input from occuring, thus helps fighting spam.

• Automated CAPTCHA bypass, ACB PRO 1.5
  CAPTCHA is an acronym for Completely Automatic Public Turing Test to Tell Computers and Humans Apart. It is a task, that human can easily solve, but computer not. It is intended...

• Lanap BotDetect ASP.NET CAPTCHA 1.5.3.0
  Lanap BotDetect ASP

• BotDetect 3 ASP CAPTCHA 3.0.0.0
  BotDetect 3 ASP CAPTCHA is a website security solution (component) designed to protect your registration, comment, poll, guestbook, content submission, and other online forms from automated spam submissions. It generates CAPTCHA images with textual...

• All_Submitter 2011
  AllSubmitter - professional directory submission software

• Lanap BotDetect for ASP 1.1.4.0
  Lanap BotDetect for ASP is a website security solution designed to prevent automated registrations with CAPTCHA image. While the code cannot be read by machine (computer program), it is easily read by a human. Key features: generates CAPTCHA image with textual code rendered in it, fully customizable, many different algorithms, custom size and...

• Lanap BotDetect for ASP.NET 1.5.3.0
  Lanap BotDetect for ASP

• CAPTCHA Control for ASP.NET 1.0
  Easily add CAPTCHA image functionality to your ASP

• ASP.NET CAPTCHA Control Component 2.0
  Easily add CAPTCHA image web control to your ASP