Free Download Wiki Lite 1.0.0.0 XAP for Windows Phone
Free Education App by Galaxy Studios

You are downloading the Wiki Lite XAP file v1.0.0.0 for Windows Phone. Wiki Lite is a free and useful Education app: The best Wikipedia client app available on storeWikipedia is a free online encyclopedia, created and edited by volunteers around the ... You can now download the offline XAP file to install & try it.
Download Locations for Wiki Lite 1.0.0.0 XAP file
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Wiki Lite XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.