Nessus (www.nessus.org) is probably one of the most popular. Sara (www-arc.com/sara/) and saint (www.wwdsi.com/saint/) as well.
mrcorp ________________________________________________________________ The information contained in this message is intended only for the recipient, may be privileged and confidential and protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, please be aware that any dissemination or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify us by replying to the message and deleting it from your computer. Thank you, Standard & Poor's