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    • Modern concurrency tools including agents, futures, promises, thread pools, supervisors, and more. Inspired by Erlang, Clojure, Scala, Go, Java, JavaScript, and classic concurrency patterns.
      Ruby
      4165.8k482Updated Dec 13, 2025Dec 13, 2025
    • ref

      Public archive
      A weak reference implementation for Ruby that works across runtimes (MRI, REE, Jruby, Rubinius, and IronRuby)
      Ruby
      96501Updated Nov 17, 2020Nov 17, 2020
    • thread_safe

      Public archive
      Thread-safe collections for Ruby (merged with concurrent-ruby)
      Java
      2019410Updated Aug 28, 2020Aug 28, 2020
    • atomic

      Public archive
      Atomic references for Ruby (merged with concurrent-ruby)
      Ruby
      22600Updated May 10, 2018May 10, 2018
    • Redirect organization pages to concurrent-ruby pages
      HTML
      1100Updated Feb 26, 2017Feb 26, 2017