The best replacement for rig is amplitube.

The best alternatives to rig are rated as following:
★★★★★  amplitube
★★★★  carolina rig
★★★★  platform
★★★★  texas rig
★★★★  well
★★★  steadicam
★★  sdrl
★★  jerry rig
★★  jury rig
★★  stabilizer
★  vest
★  glidecam
★  oil platform
★  peg
★  hwoarang
★  tactical vest
★  amplitude
★  grigri
★  plate carrier
★  jann lee
  revalver
  peg tube
  barge
  waves gtr
  sloop rig
  toneport
  pod
  jury-rig
  pod xt
  jig
  pod farm
  gearbox
  organic growth
  line 6
  standard rig
  masthead rig

Your alternative for rig is not listed? Suggest!
Speaking about rig, one probably shouldn't forget about foot controller.

Other search terms related to rig and their ratings are:
★★★★★ foot controller
★★★ pva bag
★ plate carrier
You have in mind a companion for rig and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of rig in all years. Click on graph for more.
rig
amplitube
carolina rig