I haven’t found any replacement yet for Sigmaplot that is offered only as a native Windows application. Even buying a copy of Aabel didn’t bring me back the fast and intuitive plotting capabilities. Running Sigmaplot under Parallels is a pain using too much of the system ressources while Crossover failed to start up even after following these step-by-step instructions. Finally, with Crossover 8, it seems that a win98 bottle can run Sigmaplot 9!