Offline copies of wikipedia
I have been involved for a number of years with Hilton Theunissen and the Shuttleworth Foundation and their efforts to bring computers to township schools. A part of that software suite was an offline copy of wikipedia. Early attempts I have blogged before about my own project Wizzy Digital Courier putting thin client labs down in South African classrooms. That also included a copy of the english language wikipedia. Initially in 2003 I took the whole of the then-existing English wikipedia, installed a copy of the mediawiki software in conjunction with mysql and apache as database and webserver respectively.