I like a lot of variety in my routine, so i don't have one particular favorite. I currently like using the battling ropes, which are long, thick ropes that you can do a lot of stuff with, like this https://www.youtube.com/watch?v=IImEE_IqXi
My gym also has a device similar to a Prowler, which is sort of like a heavy sled that you push or pull: https://www.youtube.com/watch?v=vFmrjpbW0b
I like squatting with a heavy boxing bag (arms wrapped around it, bag held vertically) and then walk with it.
I'll use the cable crossover machine for things that can't be done dumbbells & barbells, like horizontal movements such as the cable chest press: https://www.youtube.com/watch?v=ONqdwSd0Ez
Whichever equipment i use, i try to the keep the routine balanced by doing an equal number pushing and pulling sets, and a bit more leg sets. For example, 3 sets of pushing exercises, 3 sets of pulling, 4 or 5 leg sets, and a couple of shoulder sets.