The best replacement for machines is free weights.

The best alternatives to machines are rated as following:
★★★★★  free weights
★★★  humans
★★★  treadmills
★  dumbbells
★  weights
★  top loading
★  human labor
★  aliens
★  front loading washing machines
★  equipment
★  free weights bodybuilding
★  top load
  machines
  top load washing machines
  devices
  body weight
  sergers
  terminals
  cpap
  barbells
  tax machines
  free weights better
  top loader washing machines
  bipap
  epicentre
  exercise bikes
  compound machines
  manual machines
  front load
  slot machines
  washer dryers
  gadgets
  makers
  complex machines
  front loader

Your alternative for machines is not listed? Suggest!
Speaking about machines, one probably shouldn't forget about phones.

Other search terms related to machines and their ratings are:
★★★★★ phones
★★ simple machines
★ mechanical advantage
★ best odds
You have in mind a companion for machines and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of machines in all years. Click on graph for more.
machines
free weights
humans