L-Edit is a program often used to create MEMS layouts (if you're here, you probably know this), but it doesn't have a built-in facility to produce spirals, which are useful for inductors, springs, stress sensors, etc. This file generates a command which can be pasted into L-edit's command window in order to generate a spiral.
c = spiralgen(400,-40*pi,-31*pi,100,10)
...this generates the path command:
path -! -1157 0 -1153 -82 -1144 -163 -1129 -244 -1108 ... (it's pretty long)...
...which can be pasted into L-Edit's command window. See screenshot for examples. See the file for more details.