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SecTools.Org: Top 125 Network Security Tools For more than a decade, the Nmap Project has been cataloguing the network security community's favorite tools.
Top 100 Network Security Tools
Without a Trace: Turn Your Flash Drive into a Portable Privacy Toolkit
Whether you're trying to increase your security at an internet café, tunnel your way to your home computer from your cubicle, or leave no trace on your friend's borrowed computer, a flash drive turned portable privacy toolkit is invaluable.