JRuby

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A high performance, stable, fully threaded Java implementation of the Ruby programming language

What is JRuby?

JRuby is the effort to recreate the Ruby (http://www.ruby-lang.org) interpreter in Java. The Java version is tightly integrated with Java to allow both to script any Java class and to embed the interpreter into any Java application. See the docs directory for more information.
JRuby is a tool in the Languages category of a tech stack.

Who is using it?

17 companies use JRuby in their tech stacks, including Soundcloud, Runtastic, and Groupon.com.

Soundcloud

Runtastic

Groupon.com

esa

Hund

Nuxeo

RELEX

Lookout

Cask

Currency Cloud

stack

Advertate

Why developers like JRuby

Java
Faster than Ruby
Threads
JVM
Open source
Supports native Ruby gems out the box
Garbage collection built-in
Built-in Testing
Deploy as executable jay