The best replacement for lyx is texmaker.

The best alternatives to lyx are rated as following:
★★★★★  texmaker
★★★★  texshop
★★★  kile
★★★  scientific workplace
★★★  winedt
★★★  miktex
★★★  texmacs
★★  texstudio
★★  texworks
★  texniccenter
★  bakoma
  scribus
  lyx

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

Other search terms related to lyx and their ratings are:
★★★★★ knitr
★★★★★ beamer
★★★★ bibtex
★★★★ sweave
★★★★ jabref
★ tex
You have in mind a companion for lyx and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of lyx in all years. Click on graph for more.
lyx
texmaker
texshop