Axialconnect4r is a project mainly written in Ruby, it's free.
Simple MLLP Adapter for Ruby Event Machine
=== AxialConnect4R ===
This will be an MLLP adapter for Ruby EventMachine
=== Installing ===
[sudo] gem install eventmachine [sudo] gem install ruby-hl7
=== Running ===
cd axialconnect4r/mllp/transport ruby mllp_server.rb
=== Known Issues ===