Cube - ...cube - isn't a huge project right now, but there are big plans. View the spinning "Cubec". Get in on the sequel, "Cubed". Cube urt!
Grid - ...grid - is the early ancestor of the popular Gridcosm project. Check out the gallery and two excursions into generating grids for print.
Both projects are (ever so slightly) updated and consolidated for the new server. Links and formatting should be relatively up-to-date.