The Boehm-Demers-Weiser conservative garbage collector can be used as a garbage collecting replacement for C malloc or C++ new. It is also used by a number of programming language implementations that use C as intermediate code. Alternatively, it may be used as a leak detector for C or C++ programs. A slightly older version of the garbage collector is also included as part of the GNU compiler (gcc) distribution.
The PHP Assertion Unit Framework (phpAssertUnit) is a unit testing framework based on assertions which helps PHP developers test their code. Failing assertions about the program state are tracked in a Reporter window of a DOM-compliant browser such as IE5+, Mozilla, Netscape 6+, etc. The reporting of failures or warning messages does not disturb the running script, allowing easy Web GUI testing.
PHP Profiler Class performs code profiling and aids performance optimisation by locating the areas of code that consume most processing time. The reports it produces provide information on the number of calls to a code section, as well as the percentage and total of time spent on a section. Timing of multiple nested code sections is possible. It requires function calls to be manually inserted in the code being profiled.
Soapbox is a preload (sandbox) library that allows restriction of processes to write only to those places you want. By preloading the Soapbox library (or using the provided soapbox-script), you can run programs and prevent certain modifications outside a safe path without necessarily ending those programs. Users would typically do a successful 'make install' to a safe path that doesn't break halfway and doesn't pollute their system. Soapbox is useful when building/installing packages and in case of build problems to report as much as possible of the cause.
Carp::Clan is a module that reports errors from the perspective of the caller of a "clan" of modules, similar to "Carp.pm" itself. Instead of giving it a number of levels to skip on the calling stack, you give it a pattern to characterize the package names of the "clan" of modules which shall never be blamed for any error. These modules stick together like a "clan" and any error that occurs will be blamed on the "outsider" script or modules not belonging to this "clan".
LibSysCTr is a utility library that can be used to intercept system call functions on a Linux system. Process monitoring and sandboxing are just two of its potential uses. Internally, it uses ptrace to monitor and report events to the library caller using callbacks. Utility functions are supplied to retrieve information about the process, get/set the system call parameters, and read/write the monitored process address space.