Helps identify excessive processor usage, memory usage, and synchronization in Java programs. Written in C++; available for Solaris and NT 4.0. The JVM must support JVMPI. [Open Source, GPL/LGPL]

Platform-independent tool from Hewlett Packard which helps detect performance bottlenecks by graphically displaying profiling data. [Freeware]

Displays graphically statistics about the garbage collection activity during a program run. [Open Source, LGPL]

A profiling tool for Java with a scalable and extensible architecture, allowing its usage for exotic programming languages that use a Java backend. [Open source, GPL]

A suite of software tools for Java developers to provide code analysis, and profiling for memory, performance and thread deadlocks. [Commercial]

A plugin for the Eclipse platform which allows Java code profiling. [Open source, Common Public License]

An Article reviewing the GUI-based tool PerfAnal for analyzing the performance of applications on the JavaTM 2 Platform. By Nathan Meyers.

A Java memory profiler using bytecode instrumentation. The profiler is written entirely within Java (no JVMPI/JNI) and can be configured to minimize profiling overhead. [Open Source]