Project Posner has all of Posner’s 2100+ opinions, fully and easily searchable. ...
The law supposedly belongs to the people, but it can be surprisingly hard to find. American case reports — which are the real law of the nation — are hard to get at, and even when on the internet, rarely searchable. To get real access you generally need a Westlaw subscription which costs a small fortune. Wikilaw is a great effort to try and change this, but it is still primitive.
Posner said that he was relieved that the "cat" search turned up more than "dogs." I told him it was because he liked the phrase "cat's paw."