The best replacement for snes9x is zsnes.

The best alternatives to snes9x are rated as following:
★★★★★  zsnes
★★★★  bsnes
★★★  supergnes
★★  snesoid
  znes

Your alternative for snes9x is not listed? Suggest!
Speaking about snes9x, one probably shouldn't forget about netplay.

Other search terms related to snes9x and their ratings are:
★★★★★ netplay
★★ usb controller
You have in mind a companion for snes9x and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of snes9x in all years. Click on graph for more.
snes9x
zsnes
bsnes