The best replacement for ares is limewire.

The best alternatives to ares are rated as following:
★★★★★  limewire
★★★★★  mars
★★★★★  athena
★★★★  thor
★★★★  frostwire
★★★★  ripjaws
★★★★  kratos
★★★  taranis
★★★  hercules
★★★  aries
★★  races
★★  emule
★★  wonder woman
★  atf
★  ours
★  sentry
★  hades
★  kazaa
★  ares galaxy
★  kwa
★  kwa g36
★  bearshare
★  perseus
  shareaza
  ares lite
  limewire which is better
  morpheus
  ares
  poseidon
  aries god of war
  imesh
  king arms
  heracles
  apollo
  killer frost
  azureus

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

Other search terms related to ares and their ratings are:
★★★★★ aphrodite
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Google Trends

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ares
limewire
mars