You could have downloaded Piranha 4.0 from our software library for free. The actual developer of the software is HTC. Piranha relates to Communication Tools. This download was checked by our built-in antivirus and was rated as virus free.
From the developer:
Spam Piranha anti-spam program works with Outlook Express and all e-mail clients. Users have reported spam elimination rates of 98% and greater, while giving peace of mind by ensuring you will never lose any "wanted" e-mails. No approved sender lists or e-mail replies required, Piranha is as easy as it gets.
You may want to check out more software, such as Piranha Panic, PiranhaGammon or Underwater Hunting, which might be similar to Piranha.