The best replacement for commuter is defender.

The best alternatives to commuter are rated as following:
★★★★★  defender
★★★  resident
★★  road bike
★★  defender case
★  defender iphone 5
★  defender iphone 4
★  defender note 3
★  residential
★  defender iphone 5c
★  reflex
★  defender 5c
★  symmetry
★  defender 4s
★  defender s3
★  commuter tl
★  defender series
★  candyshell
★  non commuter
★  defender series otterbox
★  defender iphone 4s
★  defender galaxy s4
★  defender iphone
★  defender galaxy s3
  otterbox defender
  impact
  not commuter
  defender ipad
  defender otterbox
  defender htc one
  reflex series
  off campus
  not a commuter
  defender otterbox which is better
  touring bike
  reflex otterbox
  defender for iphone 5
  ballistic

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

Other search terms related to commuter and their ratings are:
★★★★★ zagg
You have in mind a companion for commuter and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of commuter in all years. Click on graph for more.
commuter
defender
resident