Canadian legal & tech people are very keen on Ross, a software system built on top of IBM's Watson that's designed for law. One of the co-founders of the Ross team* describes it as "[b]asically, what we built is a [sic] the best legal researcher available". I wish this was true but I'm very skeptical.
Watson is a question-answering computer system that was designed to win at Jeopardy (it beat the previous champion, Ken Jennings) but has since been expanded to tackle more general question-answering. IBM promises that it's a "new era of computing" but the area it's operating in, "natural language processing", is a hot space with companies like Facebook pouring resources into their own solutions. It's an area that has been of interest to researchers for more than half a century yet applications that use it are relatively rare. Has IBM made enormous breakthroughs that will soon change the way we interact with computers?
