Edward Snowden knows better than most how effectively the NSA can scope us online, so thats why he used the Amnesiac Incognito Live System (Tails) to cover his own whistleblowing. That OS is now out of beta as version 1.0, letting you surf on most PCs while leaving zero trace of your activities. Its anonymizing apps include email and IM clients, an office suite, a web browser, image and sound editors and the infamous Tor anonymity network system.