- Dorkbox ObjectPool - Apache 2.0 License
      https://github.com/dorkbox
      Copyright 2014, dorkbox, llc
        Fast (via unsafe) and compatible java object pool factory


    - FastObjectPool - Apache 2.0 License
      http://ashkrit.blogspot.com/2013/05/lock-less-java-object-pool.html
      https://github.com/ashkrit/blog/tree/master/FastObjectPool
      Copyright 2013, Ashkrit


    - Furious ObjectPool - Apache 2.0 License
      https://code.google.com/p/furious-objectpool
      Copyright Eddie Raapoto, 2012