The creator of the Mojo (Justin Rajewski) has rebranded to become Alchitry. You can find the Mojo replacement on https://alchitry.com . He has two products, one is based on the iCE40-HX8K and has an open source toolchain. The other uses the Xilinx Artix 7 and uses the latest Xilinx tools.

I haven't ...