It is a simple PHP/MySQL script which you can easily integrate into your own website in minutes
Users of your website will see the Speedcoin Captcha box on your website page with information that they need go to Speedcoin.co, where they will FREELY obtain up to 150 Free Speedcoins . Your user then sends a certain amount of those Speedcoins to the Speedcoin address at the Captcha box. After our system receives these Speedcoins from your user (it takes few seconds only), our website will confirm to your website that your new customer is a real individual. You protect your website against spam bots, prevents the same user re-filling web forms with different email addresses and at the same time you will get free Speedcoins which you later can convert to Bitcoins.
Live Demo: http://captcha.speedcoin.co/demo/example_form.php
Excellent php script! Easy to Use