One of the powerful features added to the NetBeans IDE 6 was support for Ruby, JRuby, and Ruby on Rails. The Ruby programming language has become popular with a growing number of developers because of its simplicity and its productivity features. As is the case for the Java programming language, Ruby is object-oriented, although in Ruby everything is an object -- even what are called primitives in the Java language. Ruby is also open-source and has a large and active community. Ruby's creator, Yukihiro Matsumoto, known to the Ruby world as "Matz", intended the language not only to be easy to use and highly productive, but also fun.