The best replacement for cyberduck is filezilla.

The best alternatives to cyberduck are rated as following:
★★★★★  filezilla
★★★★  transmit
★★★  fugu
★  filezilla mac
★  fetch
★  cloudberry
★  winscp
★  transmit 4
  filezilla for mac
  bitkinex
  yummy ftp

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

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



Google Trends

Scale is based on the average worldwide traffic of cyberduck in all years. Click on graph for more.
cyberduck
filezilla
transmit