QuickLogic [1] seems to support and target the open tool environment for their devices -especially the F4PGA [2] toolkit (known earlier as symbiflow). Others ha

QuickLogic [1] seems to support and target the open tool environment for their devices -especially the F4PGA [2] toolkit (known earlier as symbiflow). Others have mentioned Lattice FPGAs. But the impression I got from Lattice is that they like the development of open tools, but don't want to invest too much in it. QuickLogic on the other hand, contribute code and design directly to F4PGA project and allied ones like Migen. [1]: https://www.quicklogic.com/software/qorc-mcu-efpga-fpga-open-source-tools/ https://www.quicklogic.com/software/qorc-mcu-efpga-fpga-open... [2]: https://f4pga.org/ https://f4pga.org/