cppcheclipse is an Eclipse plugin which integrates cppcheck with the CDT project. You can run/configure cppcheck from the Eclipse UI.

CppClean attempts to find problems in C++ source that slow development particularly in large code bases. It is similar to lint; however, CppClean focuses on finding global inter-module problems rather than local problems similar to other static analysis tools.

CppSpec is a behavior driven development (BDD) framework for C++. BDD is a refinement of TDD which turns the focus from writing the tests to the process of defining the behavior of the software using tests.

CppTest is a portable and powerful, yet simple, unit testing framework for handling automated tests in C++. The focus lies on usability and extendability. Several output formats, including simple text output, compiler-like output and HTML, are supported and new ones are easily added.

CppUnit is a C++ unit testing framework. It started its life as a port of JUnit.

Features:
* XML output with hooks for additional data (XSL format avaliable in release 1.10.2 needs some FiXing)
* Compiler-like text output to integrate with an IDE
* Helper macros for easier test suite declaration
* Hierarchical test fixture support
* Test registry to reduce recompilation need
* Test plug-in for faster compile/test cycle (self testable dynamic library)
* Protector to encapsulate test execution (allow capture of exception not derived from std::exception)

CryptoLicensing for ActiveX provides a robust, yet easy way to add licensing, copy-protection and activation capabilities to your VB6, VBA, RealBasic, Delphi, Borland, MFC, ATL, C++, etc applications, libraries, components and controls. CryptoLicensing uses the latest military strength, state-of-the-art cryptographic technology to generate secure and unbreakable licenses to ensure that your software and intellectual property is protected.

CryptoPressStream is a streaming compression and encryption library.
It provides transparent access to compressed or encrypted data stored
in the stream object. All stream objects are 100% compatible with
TStream and have some advanced functionality such as progress event, LoadFromStream, LoadFromFile, SaveToStream, SaveToFile methods, Lock and Unlock methods for multi-thread usage. CryptoPressStream includes TCPSManager thread-safe component that provides easy settings of compression and encryption parameters, and contains a list of opened streams.

cssed is a small developer editor and validator, that tries to ease the CSS editing. It features syntax highlighting, syntax validation, MDI notebook based interface, quick CSS properties and values insertion, auto-completion and dialog-based insertion of CSS complex values. Being a CSS editor, it's not limited to this language. cssed haved some support for HTML (with embbeded Javascript), XML, Javascript, Java, PHP, JSP, C, C++, Apache configuration files, .htaccess, Python, Perl, SQL, SH and other languages so it can serve quite well as multi-purpose editor.

CU is simple and portable unit testing framework for handling automated tests in C. CU features a simple interface for defining unit tests and run regression tests.

CUnit is a lightweight system for writing, administering, and running unit tests in C. It provides C programmers a basic testing functionality with a flexible variety of user interfaces.

CUnit is built as a static library which is linked with the user's testing code. It uses a simple framework for building test structures, and provides a rich set of assertions for testing common data types. In addition, several different interfaces are provided for running tests and reporting results.