You are now in the directory "cad".
Here are the one-line descriptions for each items in this directory:
acs-0.25: A general purpose circuit simulator chipmunk-5.51: An electronic CAD system cider-1b1: A mixed-level circuit and device simulator (includes SPICE3) felt-3.02: A system for Finite Element Analysis geda-19990516: GNU Electronic Design Automation irsim-9.4.1: An event-driven logic-level simulator for MOS circuis kaskade-3.1.1: Adaptive linear scalar elliptic and parabolic problem solver magic-6.5: An interactive editor for VLSI layouts mars-2.1: Maryland Routing Simulator pcb-1.7: X11 interactive printed circuit board layout system qcad-1.3.3: Professional CAD system sis-1.2.1: Synthesis program for the synthesis of sequential circuits spice-3f5: A general-purpose circuit simulation program tkgate-0.9: A Tcl/Tk based digital circuit editor and simulator xcircuit-2.0b3: An X11 drawing program [especially for circuit schematics]