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Violet is a UML editor with these benefits: * It is very easy to learn and use * It draws nice-looking class, sequence, state, object and use-case diagrams * It is completely free (distributed under the GNU General Public License) * It is cross-platform Violet is intended for students, teachers, and authors who need to produce simple UML diagrams quickly. It is not intended as an industrial strength tool. Here are some of the features that industrial-strength UML programs have and that Violet does not have: * Code generation. Violet does not generate any source code from UML diagrams. * Reverse engineering. Violet does not generate UML diagrams from source code * Semantic checking of models. You can use Violet to draw contradictory diagrams XMI export or import. Violet does not generate files that can be imported into other UML tools, nor can it read model files from other tools If you just want to draw simple UML diagrams without too much fuss, chances are you'll like Violet. If you have more serious needs, check out one of the other programs.

pry is an IRB alternative and runtime developer console. Git repository: https://github.com/pry/pry

Minimal xlocale implementation for Solaris. This implements the subset of the xlocale APIs that libc++ depends on.

RaPT (Rails Plugin Tool) is a faster, updated replacement for the ./script/plugin tool that ships with Ruby on Rails.

RSCM - Ruby Source Control Management is to SCM what DBI/JDBC/ODBC are to databases - an SCM-independent API for accessing a wide variety of SCMs. RSCM currently supports CVS and Subversion. Support for ClearCase, Darcs, Monotone, Perforce and StarTeam is in progress and partly available.

RuboCop is a Ruby static code analyzer. Out of the box it will enforce many of the guidelines outlined in the community Ruby Style Guide, but most aspects of its behavior can be tweaked via various configuration options.

ruby-libvirt provides Ruby bindings for libvirt.

Rubygame is a game-development extension and library for the ruby language, with similarities to pygame. The purpose of rubygame is make the creation of games in the ruby language simple, easy, and fun, without limiting flexibility.

RubyTree is a simple and general purpose implementation of the Tree data structure for the Ruby language.

Sequel is a database toolkit for Ruby. * Sequel provides thread safety, connection pooling and a concise DSL for constructing database queries and table schemas. * Sequel also includes a lightweight but comprehensive ORM layer for mapping records to Ruby objects and handling associated records. * Sequel supports advanced database features such as prepared statements, bound variables, master/slave configurations, and database sharding. * Sequel makes it easy to deal with multiple records without having to break your teeth on SQL. * Sequel currently has adapters for ADO, DB2, DBI, Informix, JDBC, MySQL, ODBC, OpenBase, Oracle, PostgreSQL and SQLite3.