You are downloading the Ruby On Rails XAP file v126.96.36.199 for Windows Phone. Ruby On Rails is a free and useful Books & Reference app: ★ ★ ★ ★ ★ WAGmob: Over One million Paying Customers from 175+ Countries. ★ ★ ★ ★ ★WAGmob brings you simpleNeasy, ... You can now download the offline XAP file to install & try it.
Download Locations for Ruby On Rails 188.8.131.52 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Ruby On Rails XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.