Kafka Version: 0.8.x, 0.9.x, 0.10.x, 0.11.x

Maintainers: Confluent

License: Apache 2.0

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Pure Python implementation with full protocol support. Consumer and Producer implementations included, GZIP, LZ4, and Snappy compression supported.

http://github.com/dpkp/kafka-python

Kafka Version: 0.8.x, 0.9.x, 0.10.x, 0.11.x, 1.0.x

Maintainer: Dana Powers
License: Apache 2.0

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Python driver with full protocol support, Pythonic API, and managed balanced consumer implementation. GZIP and Snappy compression supported.
https://github.com/Parsely/pykafka
Kafka Version: 0.8.x,0.9.x,0.10.x
Maintainer: Parse.ly
License: Apache v22.0

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Protocol support for Kafka 0.7 in Python. GZip and Snappy compression supported

Kafka Version: 0.7.x

Maintainer: David Arthur
License: Apache v.2.0

https://github.com/mumrah/kafka-python/tree/0.7

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Also:
https://github.com/dsully/pykafka

Kafka Version: 0.7.x

Maintainer:: Dan Sulley, LinkedIn
License: Apache 2.0

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Python client from Disqus:
https://github.com/getsamsa/samsa

Kafka Version: 0.7.x

Maintainer:: Keith Bourgoin, Parse.ly
License: Apache 2.0

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Python client from Urban Airship: https://github.com/urbanairship/pykafkap

Kafka Version: 0.7.x

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Python client from Datadog: https://github.com/datadog/brod
(Producer, Simple Consumer, ZK-Consumer)

Kafka Version: 0.7.x

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erlkafka is a kafka client written in erlang

https://github.com/milindparikh/erlkafka.git

Kafka Version: 0.7.x

Maintainer: Milind Parikh
*License: BSD, LGPL

Also:
https://github.com/wooga/kafka-erlang

.NET

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A fully featured .NET client for for Apache Kafka  based on librdkafka derived from based on librdkafka (a fork of rdkafka-dotnet).

Kafka Version: 0.8.x - , 0.9.x, 0.10.x, 0.11.x

Maintainer: Confluent Inc. (original author Andreas Heider)

License: Apache 2.0

https://github.com/confluentinc/confluent-kafka-dotnet

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Pure C# client with full protocol support.  Includes consumer, producer,

lower level components and gzip support (no snappy)

Kafka Version: 0.8.x

Maintainer: James Roland 

License: Apache 2.0

https://github.com/Jroland/kafka-net

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This is a .NET implementation of a client for Kafka using C# for Kafka 0.8. It provides for an implementation that covers most basic functionalities to include a simple Producer and Consumer.

Kafka Version: 0.8.x

Maintainer: ExactTarget

License: Apache 2.0

https://github.com/ExactTargetDev/kafka-net

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.Net implementation of the Apache Kafka Protocol that provides basic functionality through Producer/Consumer classes. The project also offers balanced consumer implementation. The project is a fork from ExactTarget's Kafka-net Client.

Kafka Version: 0.8.x, 0.9.x

Maintainer: Microsoft

License: Apache 2.0

https://github.com/Microsoft/Kafkanet

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C# client, asynchronous, all 3 compressions supported (read and write), tracks leader partition changes transparently, long time in production.

Kafka Version: 0.8.x

Maintainer: Vadim Chekan
License: Apache-2.0
https://github.com/ntent-ad/kafka4net

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kafka-sharp - "High Performance" .NET Kafka Driver

Kafka Version: 0.8.x

Maintainer: Criteo

License: Apache 2.0

https://github.com/criteo/kafka-sharp

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Clojure

kafunk - ------------

Fast kafka api for JVM languages implemented in clojure.

Kafka Version: 0.8.x

Fully-featured, native F# client which works on .NET Core

Kafka Version: 0.8.x, 0.9.x, 0.10.x

Maintainer: Jet.comMaintainer: https://github.com/gerritjvv

License: Apache 2.0

https://github.com/gerritjvv/kafka-fastjet/kafunk

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Clojure

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Wrapper to the Java API for interacting with KafkaFast kafka api for JVM languages implemented in clojure.

Kafka Version: 0.8.x

Maintainer: https://github.com/pinglesgerritjvv

License: Apache 2.0

https://github.com/pinglesgerritjvv/cljkafka-kafka/ fast

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Wrapper to the Java API for interacting with Kafka

Kafka Version: 0.8.x

Maintainer: https://github.com/pingles

License: Apache 2.0

https://github.com/pingles/clj-kafka/ 

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Kafka clojure client library

Kafka Version: 0.8.x

Maintainer: Pierre-Yves Ritschard

License: MIT

Code, Documentation

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Ruby

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[Unmaintained] Pure Ruby, Consumer and Producer implementations included, GZIP and Snappy compression supported. Ruby 1.9.3 and up (CI runs MRI 2.0, JRuby and Rubinius).

Kafka Version: 0.8.x

ruby-kafka - A pure Ruby client library for the Kafka distributed log system.

Kafka Version: 0.9.x, 0.10.x, 0.11.x

Maintainer: Zendesk/ Daniel Schierbeck

Licence: Apache 2.0

https://github.com/zendesk/ruby-kafka

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Karafka - Framework used to simplify Apache Kafka based Ruby and Rails applications development. Karafka provides higher abstraction layers, including Capistrano, Docker and Heroku support. Based on ruby-kafka.

Kafka Version: 0.9.x, 0.10.x, 0.11.x

Maintainer: Maciej Mensfeld
Licence: MIT

https://github.com/karafka/karafka

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Racecar – A simple framework for writing Kafka consumers in Ruby that integrates nicely with Rails. Based on ruby-kafka. 

Kafka Version: 0.9.x, 0.10.x, 0.11.x

Maintainer: Zendesk / Daniel Schierbeck

Licence: Apache 2.0Maintainer: Bob Potter
License: MIT

https://github.com/bpotzendesk/poseidon racecar

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Karafka - Framework used to simplify Apache Kafka based Ruby applications development.

 DeliveryBoy – A simple way to publish messages to Kafka from Ruby applications. Based on ruby-kafka.

Kafka Version: 0.9.x, 0.10.x, 0.11.x

Maintainer: Maciej MensfeldZendesk / Daniel Schierbeck

Licence: MITApache 2.0

https://github.com/karafkazendesk/karafkadelivery_boy

-------------ruby--

JRuby wrapper for producers and consumers of the existing API

 kafka - A Ruby client library for the Kafka distributed log system

Kafka Version: 0.8.x

Maintainer: Zendesk/ Daniel SchierbeckLicence Joseph Lawson
License: Apache 2.0

https://github.com/zendeskjoekiller/rubyjruby-kafka

----------------------

JRuby wrapper for producers and consumers of the existing API

[Unmaintained] Pure Ruby, Consumer and Producer implementations included, GZIP and Snappy compression supported. Ruby 1.9.3 and up (CI runs MRI 2.0, JRuby and Rubinius).

Kafka Version: 0.8.x

Maintainer:  Joseph LawsonBob Potter
License: Apache 2.0MIT

https://github.com/joekillerbpot/jruby-kafkaposeidon

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https://github.com/acrosa/kafka-rb

Kafka Version: 0.7.x

Maintainer: Alejandro Crosa
License:: Apache 2.0

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Event machine client:
https://github.com/groupme/em-kafka

Kafka Version: 0.7.x

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JRuby Event stream processor
https://github.com/wooga/kafkaesque

Kafka Version: 0.7.x

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Node.js

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The node-rdkafka library is a high-performance NodeJS client for Apache Kafka that wraps the native librdkafka library. All the complexity of balancing writes across partitions and managing (possibly ever-changing) brokers should be encapsulated in the library.

https://github.com/Blizzard/node-rdkafka

Kafka Version: 0.9, 0.10

Node.js >= 4

Maintainer: Blizzard.com

License: MIT

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Kafka-Node is a NodeJS client with Zookeeper integration

Kafka Version: 0.8.x

Maintainer: sohu.com

License: MIT

https://github.com/SOHU-Co/kafka-node/

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Kafka-node is a pure JavaScript implementation for NodeJS Server with Vagrant and Docker support.

Kafka Version: 0.8.x

Maintainer: wurstmeister
License: Apache 2.0

https://github.com/wurstmeister/node-kafka-0.8-plus

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Node-kafka is a node.js wrapper for the C library librdkafka

Kafka Version: 0.8.x

Maintainer: Sutoiku

License: MIT

https://github.com/sutoiku/node-kafka

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kafka-java-bridge is a Nodejs wrapper for the JAVA high level kafka 0.8. consumer API

Kafka Version: 0.8.x

Maintainer: LivePersonInc

License: MIT

https://www.npmjs.com/package/kafka-java-bridge

https://github.com/LivePersonInc/kafka-java-bridge

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Low-level protocol support in node.js.

https://github.com/cainus/Prozess
https://npmjs.org/package/prozess

Kafka Version: 0.7.x

Maintainers: 
Gregg Caines
Eric lee
License: MIT

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Alternate node client from Tagged
https://github.com/marcuswestin/node-kafka

Also:
https://github.com/dannycoates/franz-kafka

Kafka Version: 0.7.x

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