Debezium
Open-source CDC platform — reads Postgres/MySQL/SQL Server/Mongo/Oracle logs and publishes each row change as a Kafka event.
Red Hat, 2016, since then CNCF (incubating). Connectors run as Kafka Connect tasks; each database has its own connector that decodes the replication stream (Postgres logical decoding, MySQL binlog). At-least-once semantics, schema evolution via Avro/Protobuf + Schema Registry.
The backbone of modern event-driven architectures: search → Elasticsearch, cache → Redis, ML features → Kafka topics, audit log → S3 — all from a bridge to the OLTP database without the app needing to know anything.