libruby1.9.1 1.9.1.243-0ubuntu1 (amd64 binary) in ubuntu karmic

 Ruby is the interpreted scripting language for quick and easy
 object-oriented programming. It has many features to process text
 files and to do system management tasks (as in perl). It is simple,
 straight-forward, and extensible.
 .
 This package includes the libruby, necessary to run Ruby 1.9. (API version
 1.9.1)