Cueplot is a graphical user interface (GUI) for the popular command-line program gnuplot. It is used to generate two- and three-dimensional plots of functions, data, and data fits, and is often used for high-quality graphics and educational purposes.
Wineskin Winery creates Mac OS X ports/wrappers for Windows programs/games, with an easy-to-use GUI, integrated Wine, X11 and an installer.