[jburgess777]

There has been significant progress in reverse engineering bitstream formats of some FPGAs which has allowed the development of open source FPGA workflows. If you want to know more, take a look at:

Icestorm http://www.clifford.at/icestorm/

Yosys http://www.clifford.at/yosys/

NextPNR https://github.com/YosysHQ/nextpnr

SymbiFlow https://symbiflow.github.io/