The best replacement for ducky is filco.

The best alternatives to ducky are rated as following:
★★★★★  filco
★★★  das
★★★  cm storm
★★★  razer
★★★  wasd
★★  corsair
★★  corsair k70
★★  k70
★★  max keyboard
★  leopold
★  duckie
★  steelseries
★  quickfire
★  cooler master
  noppoo
  rubber duckie

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

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



Google Trends

Scale is based on the average worldwide traffic of ducky in all years. Click on graph for more.
ducky
filco
das