A pretty sweet vulnerability scanner
Security tools that can be used to audit SIP based VoIP systems
A network security analysis and monitoring toolkit Linux distribution.
Cross-platform DICOM implementation
Exploitation Framework for Embedded Devices
Simple and fast network discovery tool
Free, open-source IP scanner
MitM pentesting opensource toolkit
A web interface for various penetration testing tools
Anonymous FTP Finder for Windows
The GNOME share scanner
Free software for bookshops.