Technology, while we don't recommend anything, there are many technological devices out there, that can be used as tools. From phones that can record your interactions with police to compasses which direct you, the wiki will try and list the best/cheapest tools available. Tools are defined broadly as anything that can be useful.
Well actually, we recommend going for freer options when available. Android is better than iPhone, but if you're geek enough something like an N900 or openmoko should be your choice.
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