The Google-Skywater project is a collaboration between the Skywater Foundry and Google's open source EDA efforts.
https://github.com/google/skywater-pdk
See also: tiny-tapeout
Shuttle runs:
Misc artsy photos: https://drive.google.com/drive/folders/11nSfUbzwplb1k0HrzEiKuinRtcOmv6G-?usp=drive_link