gdsii

circuitRF

+23

Full featured, cross-platform RF circuit + electromagnetic simulator. DC, S-parameters, harmonic balance, loadpull. Also supports 2D and 3D layout and design and electromagnetic MoM, FEM, FDTD + thermal FEM.

OpenROAD

+18

OpenROAD's unified application implementing an RTL-to-GDS Flow. Documentation at https://openroad.readthedocs.io/en/latest/

gdsfactory

+6

A Python library for designing chips (Photonics, Analog, Quantum, MEMS), PCBs, and 3D-printable objects. We aim to make hardware design accessible, intuitive, and fun—empowering everyone to build the future.