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Ald The Assembly Language Debugger (ALD) differs from GDB in that it is specifically designed to debug programs at the assembly level. It is often difficult and frustrating for assembly programmers to use GDB to debug their work. ALD aims to provide everything an assembly programmer needs to debug their code.

Antiparser antiparser is a fuzz testing and fault injection API. Fuzz testing has application as a security research methodology and for software quality assurance purposes. The purpose of antiparser is to provide an API that can be used to model network protocols and file formats by their composite data types. Once a model has been created, the antiparser has various methods for creating random sets of data that deviates in ways that will ideally trigger software bugs or security vulnerabilities.

BASH Debugger BASH Debugger provides a patched BASH that enables better debugging support as well as improved error reporting. It also contains the most comprehensive source code debugger for BASH that has been written. It can be used as a springboard for other experimental features (such as adding hashtables), since development is maintained openly and developers are encouraged to participate.

Benchmark-Timer The Benchmark::Timer class allows you to time portions of code conveniently, as well as benchmark code by allowing timings of repeated trials. It is perfect for when you need more precise information about the running time of portions of your code than the Benchmark module will give you, but don't want to go all out and profile your code.

Bug-buddy The goal of bug-buddy is to make reporting bugs very simple and easy for the user, while making the reports themselves more useful and informative for the developer. Features include the ability to obtain a stack trace from a core file or crashed application and to determine versions of packages installed on your system. The program can be started both from gmc and from the crash dialog. It supports GNOME, KDE, Debian, and Ximian bug tracking systems.

BugPort The BugPort system is a Web-based system to manage tasks and defects throughout the software development process. It is written with the PHP language, using its object-oriented capabilities, and is in use by INCOGEN for internal management of software development and QA.

BuildBot Automates the compile/test cycle required by most software projects to validate code changes. It builds and tests the tree each time a change is committed, providing status updates through a Web page or other protocols.

CMUCL CMUCL is a free, high performance implementation of the Common Lisp programming language which runs on most major Unix platforms. It mainly conforms to the ANSI Common Lisp standard. CMUCL provides a sophisticated native code compiler; a powerful foreign function interface; an implementation of CLOS, the Common Lisp Object System; which includes multimethods and a metaobject protocol; a source-level debugger and code profiler; and an Emacs-like editor implemented in Common Lisp.

CUT 'CUT' is a unit-testing framework for C, C++, and Objective-C. Unlike other unit testing tools, CUT doesn't try to be an SUnit clone. It automates much of the drudge work encountered when using other unit testing packages for the C family of languages. CUT can also be used in some circumstances to unit-test assembly language software.

Check Check is a unit test framework for C. It features a simple interface for defining unit tests, putting little in the way of the developer. Tests are run in a separate address space, so Check can catch both assertion failures and code errors that cause segmentation faults or other signals. The output from unit tests can be used within source code editors and IDEs.

Checker 'checker' can help find bugs that standard tools cannot always find. The best example is memory leaks. A memory leak is a zone of memory, allocated with malloc that is not used anymore. So the memory allocated is lost. This means you program needs more memory and runs slower, since your OS might have to start swapping. It detects bad memory accesses such as: reading uninitialized memory, writing in a freed zone, writing or reading outside of a memory block, and using NULL pointers. This is particularly useful for big programs with many functions. Checker maintains bitmaps to keep track of the status of each byte of memory. The status can be writable, readable, both, or none. When memory is allocated, the new memory becomes write-only: you are not allowed to read it because it has not been initialized. But when you you write to this new block, those bytes become readable and writable. When the block is freed, the bytes become unreadable and unwritable. Red zones are unreadable and unwritable memory, so that each access to a red zone produces a warning. This project was a GNU package. It has since been decommissioned and is no longer developed.

Clisp ANSI Common Lisp is a high-level, general-purpose programming language. GNU CLISP is a Common Lisp implementation by Bruno Haible of Karlsruhe University and Michael Stoll of Munich University, both in Germany. It mostly supports the Lisp described in the ANSI Common Lisp standard. It runs on most GNU and Unix systems (GNU/Linux, GNU/Hurd, FreeBSD, NetBSD, OpenBSD, Solaris, Tru64, HP-UX, BeOS, IRIX, AIX, Mac OS X and others) and on other systems and needs only 4 MB of RAM. The user interface comes in English, German, French, Spanish, Dutch, Russian and Danish, and can be changed during run time. GNU CLISP includes an interpreter, a compiler, a debugger, CLOS, MOP, a foreign language interface, a socket interface, i18n, fast bignums, arbitrary precision floats and more. An X11 interface is available through CLX, Garnet, CLUE/CLIO. GNU CLISP runs Maxima, ACL2 and many other Common Lisp packages.

Condenser Condenser is a tool for finding and removing duplicated Java code. Unlike tools that only locate duplicated code, Condenser is also able to automatically remove duplicated code where it is safe to do so.

CrocoPat 'CrocoPat' is a tool for querying and manipulating relations. It is easy to use because of its simple query and manipulation language based on predicate calculus and its simple file format for relations. It is efficient because it internally represents relations as binary decision diagrams, a data structure that is well-known as a compact representation of large relations. CrocoPat is general, because it manipulates not only graphs (i.e. binary relations), but n-ary relations.

Crossroads Load Balancer Crossroads is a load balance and failover utility for TCP-based services. It is a daemon program running in userspace and features extensive configurability, polling of backends using "wakeup calls", detailed status reporting, "hooks" for special actions when backend calls fail, and more. It is service-independent; it is usable for HTTP(S), SSH, SMTP, DNS, etc.

CxxTest CxxTest is a JUnit/CppUnit/xUnit-like framework for C++ that doesn't require RTTI, member template functions, exception handling, or any external libraries (including memory management, file/console I/O, or graphics libraries). It is distributed entirely as a set of header files which makes it extremely portable and usable.

DBG-Client 'DBG-Client' is the client for the DBG debugger and profiler for the PHP programming language.

DBG-Server 'DBG' is a PHP debugger and profiler. It's can backtrace errors. It shows local and global variables as well as parameters which have been passed to all nested function calls at any point of execution. It also lets you execute scripts in a step-by-step manner, set breakpoints (including conditional ones), evaluate expressions, and watch variables. The profiler lets you find bottlenecks in PHP code at the functions level, the modules level, and even the source lines level.

Dbg The dbg library is a set of C++ utilities to facilitate modern debugging idioms. It has been designed to support defensive programming techniques in modern C++ code. It integrates well with standard library usage and has been carefully designed to be easy to write, easy to read and very easy to use. 'dbg' provides various constraint checking utilities together with an integrated error logging facility. These utilities can be enabled and disabled at runtime, and in release builds, dbg library use can be compiled away to nothing.

Dbug dbug is a macro-based library to see program flow, variables, timings, errors, warnings, etc.