The official AWS X-Ray Recorder SDK for Ruby
Alba is a JSON serializer for Ruby
Prometheus instrumentation library for JVM applications
Ruby ODM framework for MongoDB
Ruby library for creating background jobs and processing them
A Ruby/Rack web server built for concurrency
Reactive Extensions for the JVM
Modern concurrency tools including agents, futures, promises, etc.
Computation and Visualization environment
Guard is a command line tool to easily handle events on file system
Marathon supports testing of Java/Swing and Java/Fx applications.
An API for asynchronous programming with observable streams
Oga is an XML/HTML parser written in Ruby
Scientific Computation and Visualization Environment