X-Scan
X-Scan is a general scanner for scanning network vulnerabilities for specific IP address scope or stand-alone computer by multi-threading method, plug-ins are supportable. Which X-Scan feature include in the following: service type, remote OS type and version detection, weak user/password pair, and all of the nessus attack scripts combination.

Create: 2005-07-18
http://xfocus.org/programs/200507/X-Scan-v3.3-en.rar