Vivado 2015.1 -

AMD-Xilinx maintains a (requires a free account). To get 2015.1:

Vivado 2015.1 was built for the operating systems of its time, primarily: vivado 2015.1

Not the best. Not the worst. Just the one that made you earn it. AMD-Xilinx maintains a (requires a free account)

💡 : If you encounter missing custom drivers in exported HDF files, AMD recommends applying specific patches or updating to version 2015.2.1. Isolated Design Flow vivado 2015.1