FOSS tools: Current versions in iic-osic are generally used. Typically the image is updated on a monthly basis - mostly compiled from source. If you want to use the latest version, select the "next" tag. Regarding PDKs (2024_05_01): sky130A, gf180mcuC, gf180mcuC using volare. And sg13g2. (If you want to work with sg13g2 in the analog/mixed area, please use IHP's dev branch, because there have been/are some changes these days)