System Security
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PeerBlock
Open Source Security Tool
PeerBlock is an advanced IP blocking utility
PeerBlock lets you control how your PC interacts with other computers over the Internet, letting you block servers and sites known to be troublesome or even dangerous. It lets you choose what to block, and you can also import or create your own lists.
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TrueCrypt
TrueCrypt - Open Source System Security
TrueCrypt is a Free open-source disk encryption software for Windows 7/Vista/XP, Mac OS X, and Linux. It can create a virtual encrypted disk within a file or encrypt a partition or (under Microsoft Windows except Windows 2000 and Windows 8 with GPT) the entire storage device (pre-boot authentication).
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