The best replacement for bcrypt is scrypt.

The best alternatives to bcrypt are rated as following:
★★★★★  scrypt
★★★  pbkdf2
★★★  sha512
★★★  mcrypt
★★  crypto
★★  hmac
★  sha1
★  sha
★  sha256
★  py-bcrypt
  sha2

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Google Trends

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bcrypt
scrypt
pbkdf2