The best replacement for cydia is icy.

The best alternatives to cydia are rated as following:
★★★★★  icy
★★★  rock
★★★  installer
★★  evasi0n
★★  evasion
★★  redsnow
★★  app store
★  redsn0w
★  installous
★  xposed
★  absinthe
★  jailbreak
  installer app
  rock jailbreak
  ziphone

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

Other search terms related to cydia and their ratings are:
★★★★★ jailbreak
★★ jailbreak ios 7
★★ jailbreaking
★★ no jailbreak
★★ evasi0n
★ jailbreak ios 7.0.4
★ ios 7
★ jailbreak iphone 4
★ jailbreak ios 7.1
★ ssh
★ limera1n
★ redsn0w
★ 4.2.1
★ ios 6
★ ifunbox
★ 4.2
★ jailbreak ios 6
★ terminal
★ blackra1n
★ redsnow
★ jailbreak ios 7.0.6
★ 6.1.3
★ jailbreak ipad
out jailbreak
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installous
greenpois0n
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winscp
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You have in mind a companion for cydia and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of cydia in all years. Click on graph for more.
cydia
icy
rock