Simple error handler class can be use to intercept and log PHP execution errors. The class provides an error handler function that outputs a stack back-trace with the functions, arguments, file, and lines of where an error occurs, as well the values of super-global variables $_GET, $_POST, and $_FILES, and also the IP address of the current user accessing the site. When used with a MySQL class that triggers PHP errors on a MySQL error, you can use it as a means to debug broken MySQL queries.
APD is a general purpose non-interactive PHP profiler/debugger that produces formatted strace/truss type reports. APD supports full stack backtraces via calls similar to croak() in Perl's carp. APD is a Zend Extension and is designed to provide timing with the minimal performance impact. APD supports varying levels of debugging and can be turned on/off in individual scripts.
AQtime is an integrated performance and memory/resource optimization toolset aimed at applications running on the Linux platform. It can be used to discover application bottlenecks, memory leaks, resource-hogging code, or untested algorithms in any software projects. It then informs you which module, class, routine or line of code is causing the problem, and lets you quickly fix it. It can profile any executable that has the Executable and Linking Format (ELF) and the stabs format of the debug information.
ATG Dynamo integration for JBuilder is a JBuilder 5 plugin that makes it easy to deploy J2EE applications to the ATG Dynamo Application Server version 5.1 (DAS). It can be installed and run with the other JBuilder 5 plugins such as BEA WebLogicServer 5.1, BEA WLS 6, IBM WebSphere 3.5, Borland AS 4.5, etc.
Accerciser lets you test all aspects of accessibility on the GNOME desktop. It uses AT-SPI to inspect and control widgets, allowing you to check whether an application is providing correct information to assistive technologies and automated test frameworks. It has a simple plugin framework that you can use to extend and customize the accessibility information displayed. It is written in Python and uses the pyLinAcc component from LSR to interact with AT-SPI using pyORBit. In essence, it is a next generation at-poke tool.
Alleyoop is a GNOME frontend to the Valgrind memory checker. Its features include a right-click context menu to intelligently suppress errors or launch an editor on the source file, jumping to the exact line of the error condition. A searchbar at the top of the viewer can be used to limit the viewable errors to those that match the regex criteria entered. A fully functional Suppressions editor is also included.