A 2-day workshop related to the upcoming opensource SG13G2 BiCMOS pdk (ft/fmax = 350/450 GHz) at IHP, Germany - not online, but I guess the presentations will be published by the speakers later on https://www.ihp-microelectronics.com/events-1/detail/openpdk-opentooling-and-open-source-design-an-initiative-to-push-development