These files are the Windows NT driver for Mesa, written by Mark Leaming (mark@rsinc.com). This code hasn't been integrated in Mesa 1.2.8 yet so some hacking will be needed to get it working. This is a temporary situation.
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.