National Counter Intelligence Center A department of the US government. Contains some very handy publications.

Spy Cops A software company that retails one of the only anti-spyware and counter-espionage software.

Spy Busters Outstanding site, filled with tips, articles and resources to busts snoops and stop espionage.

Guide to Bugs and Wire Taps Filled with information and photos of the surveillance equipment being used today.

Into the Mind of a Spy This tries to profile the typical spy.

Eavesdrop Warning Signs Signs and warnings you are being bugged, watched or tapped.

Counter Intelligence Indicators This a great article found on the US Defense Security Services training web site.

Keep Your Secrets Provides practical guidelines and techniques for keeping your personal life private. Included are techniques in deception, lying, candor, hiding and more.

X Cleaner Counter Surveillance software that detects "spyware" and rids of it. Also cleans suspicious files off your computer and helps mantain generic computer privacy.