[Ven0m]

These kind of tools are against the Yahoo! TOS and are considered malicious in my book. Consider this, the captcha is there for a reason, and if you have a problem making more than one account at a time, then you're probably going to use those IDs for malicious purposes, like booting/SPAMing.

I really don't believe they should be brought up here due to the potential security risks. Not to mention programs like these typically have malware in them.