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Rubinius - http://rubini.us/
A next generation virtual machine VM for Ruby, uses best VM and dynamic language implementation research and technology of last 30 years; core libraries are in Ruby, makes system more accessible, easier to develop and extend. Open source, BSD. |
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YARV: Yet Another Ruby VM - http://www.atdot.net/yarv/
Goal: greatly reduce execution time of Ruby programs, be fastest Ruby VM. |
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Ruby Implementations Shootout: Ruby vs Yarv vs JRuby vs Gardens Point Ruby .NET vs Rubinius vs Cardinal - http://antoniocangiano.com/2007/02/19/ruby-implementations-shootout-ruby-vs-yarv-vs-jruby-vs-gardens-point-ruby-net-vs-rubinius-vs-cardinal/
Comparison with text, tables, graphs, many reader comments. Zen and the Art of Ruby Programming. |
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On Ruby: Rubinius Interview - http://on-ruby.blogspot.com/2006/12/rubinius-interview.html
Evan Phoenix, Rubinius creator and project director explains project motives, direction, progress. |
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Cardinal - http://cardinal2.rubyforge.org/
Ruby interpreter for Parrot dynamic multilanguage bytecode VM; links, instructions. |