plotkit is kinda nice, but you can't plot multiple lines on the same graph well. You can, but by default, it distinguishes between different lines by coloring

plotkit is kinda nice, but you can't plot multiple lines on the same graph well. You can, but by default, it distinguishes between different lines by coloring the area underneath it. And when you do, it's all opaque. If you try to color the lines themselves, it turns ugly.