Ruby implemented in pure Java: newer Ruby interpreter done in Java, most built-in Ruby classes, supports interacting with and defining Java classes in Ruby, Bean Scripting Framework (BSF); news, downloads, FAQ, tutorials, limits, credits. Open source ...

Bruce Tate's Beyond Java suggests Ruby as a top contender to displace Java. Tate, James Duncan Davidson, Robert Cooper and Bill Venners opine on Ruby and its challenge to Java. O'Reilly Media.

Slide presentation teaches Java programmers Ruby style and idioms quickly. Given at OSCON 2005; Dayton-Cincinnati .NET Code Camp 2006. By Jim Weirich.

Dynamic languages are coming competitors to Java. Growing their scope beyond glue code and Web GUIs into the heavy work once done only with compiler, languages such as Python, PHP, Groovy, and Ruby have fast gained popularity. JavaWorld.

Developers are moving from full Java Platform, Enterprise Edition, to lightweight frameworks, yet even the lightest lacks the simplicity of RoR. JRuby joins Rails with the power, breadth, and industry acceptance of JVM, Java libraries, and application...

Alternative Ruby implementations seem to be growing in the Ruby community. JRuby is most advanced now. Charles Nutter and Thomas Enebo, two main JRuby programmers, comment. O’Reilly Media.

Brief story of Sun hiring Charles Nutter and Thomas Enebo to work on JRuby full time, with speculations. Ablog.

Small tutorial with many short pages. By Jim Weirich.

Independent projects are bringing Ruby to 2 widely-used development frameworks; reactions of Sun, Microsoft. Internetnews.com.