You are now in the directory "cad".
Here are the one-line descriptions for each items in this directory:
acs-0.21: A general purpose circuit simulator. chipmunk-5.10: chipmunk-5.10, an electronic CAD system irsim-9.2: IRSIM 9.2 magic-6.4.4: Magic CAD Tool 6.4.4 pcb-1.4.0: X11 interactive printed circuit board layout system spice-3f4: The Spice Circuit Simulator.