Hello,
Tools of the trade will be a series of posts devoted to the tools I use for Warmachine, from paints, to paint brush to list builders. I'll be discussing my personal experince with them and everything that has to do with them.
Today we'll talk about that much talked about app, the War Room. The first thing I want to point out is what War Room was designed to be.
"War Room is designed to be a card library and a free-form tool to organize all the cards you need to play the game and requires knowledge of how to build lists. This allows the app to support army lists of almost any design."
Source: http://privateerpress.com/war-room-road-map-and-faq