rdkafka vs Kafka Manager: What are the differences?

Developers describe rdkafka as "Modern and performant Kafka client library for Ruby". This gem is a modern Kafka client library for Ruby based on librdkafka. It wraps the production-ready C client using the ffi gem and targets Kafka 1.0+ and Ruby 2.3+. On the other hand, Kafka Manager is detailed as "A tool for managing Apache Kafka, developed by Yahoo". This interface makes it easier to identify topics which are unevenly distributed across the cluster or have partition leaders unevenly distributed across the cluster. It supports management of multiple clusters, preferred replica election, replica re-assignment, and topic creation. It is also great for getting a quick bird’s eye view of the cluster.

rdkafka and Kafka Manager can be primarily classified as "Kafka" tools.

Kafka Manager is an open source tool with 8.45K GitHub stars and 2.06K GitHub forks. Here's a link to Kafka Manager's open source repository on GitHub.