The best replacement for mega is kilo.

The best alternatives to mega are rated as following:
★★★★★  kilo
★★★★  giga
★★★★  note 3
★★★  note 2
★★★  s4
★★  dropbox
★  kilo bigger
★  giga bigger
★  kilo which is bigger
★  kila
★  kilobytes
★  samsung galaxy s4
★  kilobyte
★  uno
  noveske
  gig
  galaxy note 3
  mebi
  samsung note 3
  note 1
  sby
  galaxy s4
  samsung s4
  grand
  note
  bona traffic

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

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



Google Trends

Scale is based on the average worldwide traffic of mega in all years. Click on graph for more.
mega
kilo
giga