Annotation-triggered method call logging for your debug builds.
The reliable, generic, fast and flexible logging framework for Java.
An extensible Java library for HTTP request and response logging
Graylog Extended Log Format (GELF) implementation in Java for all major logging frameworks: log4j, log4j2, java.util.logging, logback, JBossAS7 and WildFly 8-12
Structured logging for Java on top of SLF4J API
Best-of-breed OpenTracing utilities, instrumentations and extensions
Splunk logging appenders for popular Java Logging frameworks