The best replacement for callcentric is voip.ms.

The best alternatives to callcentric are rated as following:
★★★★★  voip.ms
★★★★★  ooma
★★★★  localphone
★★★  anveo
★★★  magicjack
★★  vitelity
★  sipgate
★  callwithus
  voip ms

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

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



Google Trends

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callcentric
voip.ms
ooma