Kiwix - Offline Reader For Wikipedia
Kiwix enables you to have the whole Wikipedia at hand wherever you go. Kiwix gives you access to the whole human knowledge. You don't need Internet, everything is stored on your computer, USB flash drive or DVD. It is basically an offline reader for web content. It supports the ZIM format, a highly compressed open format with additional meta-data.
It supports Full text search, Bookmark and Notes, PDF/HTML export, Integrated content manager and downloader and lot more.