Offline Wiki Redux, "downloads a copy of nearly all of the textual content of the English Wikipedia"
Except from antimatter15.com
There’s just something incredibly alluring about the concept of holding the sum of human knowledge with you at all times. While near-ubiquitous connectivity alleviates this to a certain extent, the momentary lapses of networking are incredibly corrosive to an information dependent mentality. Wikipedia never ceases to amaze me and, while I’ve tried in the past to encapsulate part of its sheer awesomeness, this marks a much more significant attempt.
below excerpt from here
This application saves and downloads a copy of nearly all of the textual content of the English Wikipedia locally so that it can be accessed without internet connectivity.
Install
You don't really need to, just bookmark this page and you can use it any time with or without internet access. If you want the convenience of getting to this from your new tab page, install the chrome app.