- language: "C,C++"
  library: >-
    [zipkin-cpp](https://github.com/flier/zipkin-cpp)
  framework: gRPC
  propagation: Http (B3)
  transports: Http, Kafka, Scribe, X-Ray
  sampling: "Yes"
  notes: includes benchmarks

- language: "C#"
  library: >-
    [ZipkinTracerModule](https://github.com/mdsol/Medidata.ZipkinTracerModule)
  framework: OWIN, HttpHandler
  propagation: Http (B3)
  transports: Http
  sampling: "Yes"
  notes: lc support. 4.5.2 or higher

- language: Elixir
  library: >-
    [Tapper](https://github.com/Financial-Times/tapper)
  framework: >-
    Any, [Plug](https://github.com/elixir-lang/plug) supported via [Tapper Plug](https://github.com/Financial-Times/tapper_plug)
  propagation: Http (B3)
  transports: Http
  sampling: "[Yes](https://github.com/Financial-Times/tapper_plug#sampling)"
  notes: >-
    Comprises tracing and reporting OTP-application [Tapper](https://github.com/Financial-Times/tapper),
    with server integration via [Tapper Plug](https://github.com/Financial-Times/tapper_plug), and support for tracing
    [Absinthe](http://absinthe-graphql.org/) via [Tapper Absinthe Plug](https://github.com/Financial-Times/tapper_absinthe_plug)

- language: Go
  library: >-
    [go-zipkin](https://github.com/elodina/go-zipkin)
  framework: x/net Context
  propagation:
  transports: Kafka
  sampling: "Yes"

- language: Go
  library: >-
    [monkit-zipkin](https://github.com/spacemonkeygo/monkit-zipkin/)
  framework: >-
    [Monkit](https://github.com/spacemonkeygo/monkit/)
  propagation: Http (B3), easy to add others
  transports: Scribe, UDP, easy to add others
  sampling: "Yes"

- language: Java
  library: >-
    [cassandra-zipkin-tracing](https://github.com/thelastpickle/cassandra-zipkin-tracing)
  framework: >-
    [Apache Cassandra](http://cassandra.apache.org)
  propagation: CQL (B3)
  transports: Http, Kafka, Scribe
  sampling: "Yes"
  notes: Java 8+

- language: Java
  library: >-
    [Dropwizard Zipkin](https://github.com/smoketurner/dropwizard-zipkin)
  framework: >-
    [Dropwizard](http://www.dropwizard.io)
  propagation: Http (B3), Thrift
  transports: Http, Scribe
  sampling: "Yes"
  notes: Java 7 or higher

- language: Java
  library: >-
    [htrace](https://github.com/apache/incubator-htrace/tree/master/htrace-zipkin)
  framework: HDFS, HBase
  propagation:
  transports: Http, Scribe
  sampling: "Yes"
  notes: Java 7 or higher

- language: Java
  library: >-
    [Spring Cloud Sleuth](https://github.com/spring-cloud/spring-cloud-sleuth)
  framework: Spring, Spring Cloud (e.g. Stream, Netflix)
  propagation: Http (B3), Messaging (B3)
  transports: Http, Spring Cloud Stream Compatible (e.g. RabbitMQ, Kafka, Redis or anything with a custom Binder)
  sampling: "Yes"
  notes: Java 7 or higher

- language: Java
  library: >-
    [Wingtips](https://github.com/Nike-Inc/wingtips)
  framework: >-
    [Any Servlet API framework](https://github.com/Nike-Inc/wingtips/tree/master/wingtips-servlet-api),
    [roll-your-own](https://github.com/Nike-Inc/wingtips#generic-application-pseudo-code),
    [async framework support](https://github.com/Nike-Inc/wingtips#usage-in-reactive-asynchronous-nonblocking-scenarios)
  propagation: Http (B3)
  transports: Http
  sampling: "Yes"
  notes: Java 7 or higher, [SLF4J MDC support](https://github.com/Nike-Inc/wingtips#mdc_info) for auto-tagging all log messages with tracing info

- language: JavaScript
  library: >-
    [appmetrics-zipkin](https://github.com/RuntimeTools/appmetrics-zipkin)
  framework: Express, Koa
  propagation: Http (B3)
  transports: Http
  sampling: "Yes"
  notes: Provides zipkin support with addition of a single line of code

- language: Python
  library: >-
    [py_zipkin](https://github.com/Yelp/py_zipkin)
  framework: Any
  propagation: Http (B3)
  transports: Pluggable
  sampling: >-
    [Yes](https://github.com/Yelp/py_zipkin/blob/2b1218ea6438fa7fd35946092de58496f4f759dd/py_zipkin/zipkin.py#L97)
  notes: Generic python tracer, used in pyramid-zipkin; py2, py3 support.

- language: Python
  library: >-
    [pyramid_zipkin](https://github.com/Yelp/pyramid_zipkin)
  framework: >-
    [Pyramid](http://docs.pylonsproject.org/projects/pyramid/en/latest/)
  propagation: Http (B3)
  transports: >-
    [Kafka \\| Scribe](http://pyramid-zipkin.readthedocs.org/en/latest/configuring_zipkin.html#zipkin-transport-handler)
  sampling: >-
    [Yes](http://pyramid-zipkin.readthedocs.org/en/latest/configuring_zipkin.html#zipkin-tracing-percent)
  notes: py2, py3 support.

- language: Python
  library: >-
    [swagger_zipkin](https://github.com/Yelp/swagger_zipkin)
  framework: >-
    Swagger ([Bravado](http://bravado.readthedocs.io/en/latest/)), to be used with [py_zipkin](https://github.com/Yelp/py_zipkin)
  propagation: Http (B3)
  transports: >-
    [Kafka \\| Scribe](http://pyramid-zipkin.readthedocs.org/en/latest/configuring_zipkin.html#zipkin-transport-handler)
  sampling: >-
    [Yes](http://pyramid-zipkin.readthedocs.org/en/latest/configuring_zipkin.html#zipkin-tracing-percent)
  notes: Uses py_zipkin; py2, py3 support.

- language: Python
  library: >-
    [flask_zipkin](https://github.com/qiajigou/flask-zipkin)
  framework: >-
    [Flask](http://flask.pocoo.org)
  propagation: Http (B3)
  transports: Pluggable
  sampling: >-
    [Yes](http://qiajigou.click/flask-zipkin/)
  notes: Uses py_zipkin; py2, py3 support.

- language: Scala
  library: >-
    [akka-tracing](https://github.com/levkhomich/akka-tracing)
  framework: >-
    [Akka](https://akka.io), [Spray](https://spray.io), [Play](https://www.playframework.com)
  propagation: Http (B3), Thrift
  transports: Scribe
  sampling: "Yes"
  notes: Java 6+, Scala 2.10+, activator templates for [Akka](https://github.com/levkhomich/activator-akka-tracing) and [Play](https://github.com/levkhomich/activator-play-tracing)

- language: Scala
  library: >-
    [play-zipkin-tracing](https://github.com/bizreach/play-zipkin-tracing)
  framework: >-
    [Play](https://www.playframework.com)
  propagation: Http (B3)
  transports: Http
  sampling: "Yes"
  notes: Uses Brave4; Play 2.3, 2.4 and 2.5 support.

- language: PHP
  library: >-
    [phpkin](https://github.com/whitemerry/phpkin)
  framework: Any
  propagation: "B3, custom (depends on user implementation)"
  transports: "http, log file"
  sampling: "Yes"
  notes: Simple and full implementation without dependencies. Very flexible.

- language: PHP
  library: >-
    [Molten](https://github.com/chuan-yun/Molten)
  framework: Any
  propagation: "B3"
  transports: "http, log file, syslog"
  sampling: "Yes"
  notes: Application transparent;php5.6 or higher;auto trace pdo/mysqli/curl/memcached/redis;auto add http B3 header.

- language: PHP
  library: >-
    [zipkin-php](https://github.com/jcchavezs/zipkin-php)
  framework: Any
  propagation: "B3"
  transports: "http, log file"
  sampling: "Yes"
  notes: V2 native based on brave's model, compatible with PHP 5.6 and PHP 7. Check [this](https://github.com/openzipkin/zipkin-php-example) out for an example.