topicctl - A tool for easy, declarative management of Kafka topics. Includes the ability to "apply" topic changes from YAML as well as a repl for interactive exploration of brokers, topics, consumer groups, messages, and more.
sarama - Sarama is an MIT-licensed Go client library for Apache Kafka version 0.8 (and later).
kadeck - Apache Kafka Monitoring, Kafka UI and data platform for Desktop or Web
kafkacat - Generic command line non-JVM Apache Kafka producer and consumer
kafka-jackson - Kafka Serializer, Deserializer, and Serde for Jackson JSON
kafka-lag-based-assignor - Kafka partition assignor that distributes lag evenly across a consumer group
kafkahq - Kafka GUI for topics, topics data, consumers group, schema registry, connect and more
secor - Secor is a service implementing Kafka log persistence
reactive-kafka - Alpakka Kafka connector - Alpakka is a Reactive Enterprise Integration library for Java and Scala, based on Reactive Streams and Akka.
kafka-connect-file-pulse - a polyvalent, scalable and reliable, Kafka Connector that makes it easy to parse, transform and stream any file, in any format, into Apache Kafka.