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'''Kiwix''' is an offline reader for web content. It's software intended to make Wikipedia available without using the internet, but it is potentially suitable for all HTML content. Kiwix supports the [http://www.openzim.org ZIM format], a highly compressed open format with additional meta-data.
Kiwix is [http://en.wikipedia.org/wiki/Free_software free software], which means you can freely copy, modify and distribute it.
Kiwix is mostly installed in schools, universities and libraries which can't afford a broadband Internet access. It is much faster than the Internet and also can be used by many institutions to save bandwidth and reader's time. But many people use Kiwix for their own personal purposes, for example, of people suffering from censorship or prisoners.