Poser
WKR
VersaClimbers are kind of old school but I think they are the best "machine"
Those are pretty cool. I haven't used one in a LONG time, but I used to go to a gym that had one and would train with a pack on for alpine climbing. You can probably find old used ones for cheap, but the new models are $$$. You could buy a new Rower and a new Ski Erg and a new Airdyn for cheaper than what a new Versaclimber costs.
Seems like that in the late 80s and into the 90s, "alternative" machines with anaerobic potential were all the rage at gyms, but the modern Globo gyms have really settled into Treadmills, Ellipticals & Stationary bikes. While there is a huge selection machines in gyms these days, non elliptical stair climbers, rowers etc seem to be becoming rarities.