As others have already mentioned the Lattice ice40 family is supported by OSS chains through project icestorm [0]. There were some nice boards floating around

As others have already mentioned the Lattice ice40 family is supported by OSS chains through project icestorm [0]. There were some nice boards floating around though you may have to watch out for supply chain issues still plaguing this market. Examples: - icoboard: has the 8k LUTs chip, comes with soldered PMODs[1], if you get it watch out as you either need a RaspberryPI with GPIOs soldered to program it, or you purchase their USB FTDI interface in addition. See: http://icoboard.org/ http://icoboard.org/ - iCEBreaker, comes with the 5k LUTs chip, has the USB-FTDI interface built-in, but you need to solder the PMODs yourself. See: https://www.crowdsupply.com/1bitsquared/icebreaker-fpga#products https://www.crowdsupply.com/1bitsquared/icebreaker-fpga#prod... [0] https://github.com/YosysHQ/icestorm https://github.com/YosysHQ/icestorm [1] https://digilent.com/reference/pmod/start https://digilent.com/reference/pmod/start