is an offline reader for Web content. It's especially thought to make Wikipedia available offline. This is done by reading the content of the project stored in a file format ZIM, a high compressed open format with additional meta-data. Kiwix uses the Mozilla framework and is available in more than 80 languages. It has full text search, tabbed navigation and possibility to export articles to PDF and HTML.
Kiwix is a free software (GPL3), that means you can freely copy, modify and spread it.