Now that the thread is alive again...
WaveLAN was mentioned much earlier in the thread. Its perhaps worth noting that there are two very different types of WaveLAN hardware out there.
The first kind, the original WaveLAN, really does support basically all the network stacks from the mid 90s. There are NDIS2 and ODI drivers for DOS 5.0+ and Windows for Workgroups, plus NDIS3 drivers for Windows 95 and NT. There might be a packet driver too though if not shims would allow the ODI or NDIS2 driver to be used. They come in PCMCIA, ISA and MCA variants.
Problem is this hardware predates 802.11 WiFi and does not interoperate with 802.11 hardware at all - it can only talk to other WaveLAN hardware including dedicated WaveLAN Access Points. Epson, Hitachi, NEC and DEC all sold this WaveLAN hardware. DECs stuff was branded as RoamAbout DS which I've got a small box of somewhere that I really ought to put to use someday. A couple of PC Cards, and an access point which is a bit odd as it doesn't actually have a built-in radio - instead you put one of the PC cards in it (doesn't have to be a RoamAbout PC card either - any WaveLAN or RangeLAN2 PC Card will do apparently). Drivers for RoamAbout hardware (may work for other WaveLAN hardware too) can be found here.
Later on when 802.11 was ratified in the late 90s Lucent reused the WaveLAN brand for a line of standard 802.11 WiFi hardware which was eventually renamed ORiNOCO. These appear to have a 16bit ODI driver (Netware / IPX) and a Packet driver for DOS, plus NDIS drivers for Windows 9x and NT. No DOS or Windows for Workgroups NDIS drivers though with shims you might be able to get away with the 16bit ODI driver. Drivers for this hardware can currently be found here.