ImHuman – a Humanized “Are you human?” checker
History
The internet we know is nearly 10 years old. Before that, it was dark and static ages, where you put up an HTML website via editors and FTPs and wait for people to email you or mainly phone you about your website.
With the new interactive web pages and database connections, we human beings were finally able to post our weird, funny, whatever comes to our mind ideas in to the world wide web via guest books, forums, comments and many many more you know of. But like every new innovation we made, we brought up problems with that also. We started to flood the entry forms in terms of fun, hacking, attacking, advertisement or digital harassment. And like this is not enough we have created applications to do the harassment for us faster and easier (attack launchers, flooder, spam bots). But hey, it was all 56K modem speed right, what was the harm in 1 spam per minute in once a week when couple geeks connects to the internet from SF to check some new chicks. PCs and their power were limited also, taking 4 minutes to power up and 2 minutes to load the internet browser. Well then we got cable modems, T1 lines, ADSL lines, fiber optics and satellite connections all for to download porn faster of course 
Abuse to the top! With faster doubled, quadrant CPUs, RAMS bigger than your foot and with an internet population of 70% world population! Yeah baby now we are talking!