Yes, there's a fully open stack for the Lattice iCE40s (the largest of which has 7680 LUTs): http://www.clifford.at/yosys/ http://www.clifford.at/yosys/ (Veri

Yes, there's a fully open stack for the Lattice iCE40s (the largest of which has 7680 LUTs): http://www.clifford.at/yosys/ http://www.clifford.at/yosys/ (Verilog synthesis) https://github.com/cseed/arachne-pnr https://github.com/cseed/arachne-pnr (Place and route) http://www.clifford.at/icestorm/ http://www.clifford.at/icestorm/ (Bitstream generator and programmer)