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: An electronic CAD system. felt-3.02: A system for Finite Element Analysis irsim-9.4.1: An event-driven logic-level simulator for MOS circuis. magic-6.5: An interactive editor for VLSI layouts. mars-2.1: Maryland Routing Simulator pcb-1.4.0: X11 interactive printed circuit board layout system spice-3f4: A general-purpose circuit simulator.