TestTrack Pro is a powerful defect tracking/bug tracking application. The application's server component runs on Linux servers and can be accessed by both Web and Windows clients. A full-featured defect management solution, TestTrack Pro includes multiple security configurations, integrated email notification, email importation, XML support, and much more. It easily scales from a single user to hundreds.
Struct::Compare is a Perl module that compares two values of any type and structure and returns true if they are the same. It does a deep comparison of the structures, so a hash of a hash of a whatever will be compared correctly. This is especially useful for writing unit tests for your modules.
pyprof is a wrapper around python's profile module for easily profiling python scripts without having to specify the whole path to them if they are in $PATH. It has command line arg and rc file configurable behaviors. If pyprof_auto is used, any python code can be profiled merely by setting the $PYPROF environment variable.
Module::Reloadable is a Perl module which can be used in any environment which runs Perl programs permanently (FastCGI, mod-perl, GTK). It is intended to reload the defined modules if they change and if the optionally-specified conditions are true. It was originally written for speeding up development in FastCGI.
Lloyd's Java Shell is a java scripting tool (it could read and execute java-like statement from any input stream) that could easily be plugged into an application and modify its object - so it is also a configuration tool. It is also a good test tool, as you could easily use it to test any feature of your new object.