- language: Go
  library: >-
    [zipkin-go-opentracing](https://github.com/openzipkin/zipkin-go-opentracing)
  framework: >-
    [Go kit](https://gokit.io), or roll your own with [OpenTracing](http://opentracing.io)
  propagation: Http (B3), gRPC (B3)
  transports: Http, Kafka, Scribe
  sampling: "Yes"
  notes:

- language: Java
  library: >-
    [brave](https://github.com/openzipkin/brave)
  framework: Jersey, RestEASY, JAXRS2, Apache HttpClient, Mysql
  propagation: Http (B3), gRPC (B3)
  transports: Http, Kafka, Scribe
  sampling: "Yes"
  notes: Java 6 or higher

- language: JavaScript
  library: >-
    [zipkin-js](https://github.com/openzipkin/zipkin-js)
  framework: >-
    [cujoJS](http://cujojs.com), [express](http://expressjs.com/), [restify](http://restify.com/)
  propagation: Http (B3)
  transports: >-
    [Http, Kafka, Scribe](https://github.com/openzipkin/zipkin-js#transports)
  sampling: >-
    Yes
  notes: >-
    Uses continuation-local-storage under to hood, so you don't have to pass around an explicit context

- language: Ruby
  library: >-
    [zipkin-ruby](https://github.com/openzipkin/zipkin-ruby)
  framework: >-
    [Rack](http://rack.github.io/)
  propagation: Http (B3)
  transports: Http, Kafka, Scribe
  sampling: "Yes"
  notes: lc support. Ruby 2.0 or higher

- language: Scala
  library: >-
    [zipkin-finagle](https://github.com/openzipkin/zipkin-finagle)
  framework: >-
    [Finagle](https://github.com/twitter/finagle)
  propagation: Http (B3), Thrift
  transports: Http, Kafka, Scribe
  sampling: "Yes"
  notes: Library is written in Java. Propagation is defined in Finagle itself.