An application for visual viewing and filtering of log4j events. [Open Source, GPL]

Provides logging, tracing functions, and filters. Part of the IBM alphaWorks project. [Commercial]

The home of a Java Community Process expert group defining standard logging APIs for error and trace logging. The latest draft and status history is available.

Java based syslogd client and server implementation. [Open Source, GPL]

A logging class library with runtime configurable formatting and event filtering. [Open Source, MPL]

Log4J compatible for logging messages to database. [Open Source, APL]

Converts arbitrary Java objects into strings for logging. Configured via a properties file similar to log4j.properties. [Open Source, APL]

A logging system written in pure Java for logging and supervising non-distributed as well as distributed Java-, J2EE- and legacy applications. [Commercial]

An implementation of the Java logging API (java.util.logging) including a graphical user interface. [Open Source]

A Eclipse plugin which helps use logger easily in Java Projects. It's not bound to any special logging framework, but can used with Log4j, Commons Logging, or custom logger.

Logging package for printing log output to different local and remote destinations. Selection and filtering of log events at runtime. [Open Source, APL]

An implementation of the Log4j interface with a small memory footprint. [Open Source, APL]

This API Conforms to the Logging API in JDK1.4, but is available for pre-1.4 JDKs.

Framework for logging in Java. [Open source]