Apache Logging Services
The Apache Logging Services project creates and maintains open-source software related to the logging of application behavior and released at no charge to the public.
Logging Frameworks
Apache Log4j®
A versatile, industrial-grade Java logging framework composed of an API, its implementation, and components to assist the deployment for various use cases.
Advanced Log Processing
Apache Flume
Distributed, reliable, and available service for efficiently collecting, aggregating, and moving large amounts of log data.
Others
Dormant Projects
Logging Services projects that are no longer actively maintained.