Coriolis2 source code: http://coriolis.lip6.fr/
Chips4Makers FlexLib Cell Library based on FreePDK45: https://gitlab.com/Chips4Makers/c4m-pdk-freepdk45/-/releases
Automated Layout scripts for generation of GDS-II Files: https://git.libre-soc.org/?p=soclayout.git;a=summary
please do try to get your facts right and not mislead people by making false claims, eh?