"Most of these are district court cases. " Yes, but there is hope at CAFC: See, for example, Buysafe v. Google "The compiler and VM patents from IBM, Sun, an

"Most of these are district court cases. " Yes, but there is hope at CAFC: See, for example, Buysafe v. Google "The compiler and VM patents from IBM, Sun, and others that hang over the head of anyone who writes either still exist. " I'm not sure IBM belongs on this list. When I worked at IBM, they were generally fine with pledging a ton of patents to open source, including any compiler patents that were interesting. For example, we got the graph coloring register allocation patents pledged.