The best replacement for resharper is coderush.

The best alternatives to resharper are rated as following:
★★★★★  coderush
★★★  visual assist
★★★  fxcop
★★★  stylecop
★★★  justcode
★★  webstorm
★  telerik justcode
★  refactor pro
★  devexpress coderush
★  devexpress
★  visual studio 2012
★  testdriven.net
  vs2013

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

Other search terms related to resharper and their ratings are:
★★★★★ stylecop
★★★ nunit
★ visual studio
★ coderush
You have in mind a companion for resharper and it is not yet here? Propose!



Google Trends

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resharper
coderush
visual assist