Lanapsoft BotDetect ASP.NET CAPTCHA 2.0.8.0
Lanapsoft BotDetect - ASP.NET CAPTCHA is a website security component designed to protect your registration, comment, and other online forms from automated spam submissions. It generates CAPTCHA images that easily tell bots and humans apart. 50 different CAPTCHA algorithms, custom size and image format, sound support that allows access even to visually impaired! 'Developer Edition' includes FULL SOURCE CODE and ROYALTY FREE distribution rights!
captcha, captchas, captcha asp.net, asp.net captcha, captcha component, captcha software, bot, spambot, form spam, prevent automated form submissions,

  BotVerify for ASP.NET 2.00
BotVerify for ASP.NET is an ASP.NET Web Control that allows you to prevent automated registrations on your web site - (known as CAPTCHA?). Provide with over 10,000 variety of CAPTCHA output textures.
captcha, asp.net, web control, activex, component, php, verify, botverify, captcha,

  Human Pictcha 1.0.5
Human Pictcha is a protection in a form of an image (a captcha), which can be embedded inside your web forms, and which will filter out various forum spam, guestbook spam, form spam, signup spam, password attacks. - For PHP or Perl forms - Easy to setup and maintain - Full open source - Compatible with the typical webserver setup - Secure and hard to defeat by OCR - You can tune it to match your website looks - Complete documentation
captcha, forum spam, guestbook spam, form spam, signup spam, password attack,