Pandora White Box is a free suite of approximately 30 networking tools for network and system administrators as well as security experts.
It has a very simple interface with 5 categories including Utilities, Cryptography, Vulnerability Scanners and Security. From each of these tabs, you can run just about any tool a network administrator might need.
We counted approximately 30 tools including:
Denial of service scanner
Denial of Service Scanner
Typically a program like this can cost you hundreds of dollars but Pandora White Box is completely free, small and something any network geek would want in their toolbox.