Aid in finding infinite loops in Java programs on production systems
StackTraceSealer is a JConsole plugin with its own Java Agent Library that can be used to seal stack frames on a thread stack trace to detect whether these frames have changed or they have remained the same all the time to aid in finding an infinite loop on a production system when all you have is a long seemingly constant stack trace in the thread dump.
Concutest is a collection of tools designed to make the development and testing of concurrent Java programs easier and more reliable. Concutest is available under the BSD License and under active development by the JavaPLT group at Rice University.