What is Rubinius?
A virtual machine for running Ruby programs and a Ruby core library
Why does it matter?
We aim to increase Ruby use and help Ruby applications toward a unified compatibility. This means for you: less fragmentation in developer knowledge, not getting backed into hardware vendor lock-in.
A spec driven Ruby implementation. A core library written in Ruby. More first class objects than you can shake a stick at. Super easy to contribute. Low barrier to entry. If you can breathe, you can commit.