Logstash - transport and process your logs, events, or other data
Ruby enVironment Manager (RVM)
JRuby, an implementation of Ruby on the JVM
Alba is a JSON serializer for Ruby, JRuby and TruffleRuby.
An action to download a prebuilt Ruby and add it to the PATH in 5 seconds
Warbler chirpily constructs .war files of your Ruby applications.