Some free servers that had "emotes" had the emote [e puke which would temporarily drop what looked like dirt or horse dung as vomit on the ground that you could walk on top of and it'd act as a ground. Not sure there are many items on official servers that do this anymore though outside of Gozas. I remember a lot of items USED to, and before the efield trick were how you would have to access castle/keep roofs. Items like pillows/cushions recovered from ship wrecks, footstools were popular (and really their only practical use), wooden benches, cloth. Off the top of my head I can say with some certainty that house teleporters (vet reward) will raise you 1 tile when stood upon.