The best replacement for infopath is access.

The best alternatives to infopath are rated as following:
★★★★★  access
★★★  acrobat
★★  sharepoint designer
★★  livecycle
★  web forms
★  word forms
★  nintex forms
★  nintex
  adobe forms
  pdf form
  sharepoint designer 2010
  adobe livecycle
  asp net forms
  xforms

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

Other search terms related to infopath and their ratings are:
★★★★★ sharepoint
★★★ sharepoint 2010
★★ sharepoint 2013
★★ sharepoint 2007
workflow
sharepoint workflow
infopath
sharepoint list
You have in mind a companion for infopath and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of infopath in all years. Click on graph for more.
infopath
access
acrobat