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3.Alternative Encrypting Applications.
If the default operating system encryption methods don't work for you or you want something a little more secure or efficient, there are a few other third-party applications out there for your convenience. Some recommendations include:
GNU Privacy Guard (WIndows, OSX, Linux) - Free
TrueCrypt (Windows, OSX, Linux) - Free
7-Zip (Windows) - Free
AxCrypt (Windows) - Free