PypelineC fully open-source Xilinx 7-series FPGA flow made possible with fantastic tools like:
Yosys + nextpnr-xilinx + Project X-Ray + openXC7. github.com/openxc7 #openxc7
Thanks to github user billiegoose for the PR!
github.com
openXC7
Free and open source FPGA toolchain for AMD/Xilinx Series 7 chips, including Kintex-7. Supports Kintex7 (including 325/420/480t), Artix7, Spartan7 and Zynq7. - openXC7