cloc counts blank lines, comment lines, and physical lines of source code in many programming languages. Given two versions of a code base, cloc can compute differences in blank, comment, and source lines.

cloc contains code from David Wheeler's SLOCCount. Compared to SLOCCount, cloc can handle a greater variety of programming languages.

The Silver Searcher (ag) is a tool for quickly searching large numbers of files. It's intended primarily for source code repositories, and respects files like .gitignore and .hgignore. It's also an order of magnitude faster than its inspiration, ack, and less specialised tools such as grep.

Kcov is a code coverage tester for compiled languages, Python and Bash. It was originally a fork of Bcov, but has since evolved to support a large feature set in addition to that of Bcov.

Kcov uses DWARF debugging information for compiled programs to make it possible to collect coverage information without special compiler switches.

GNU GLOBAL is a source code tagging system that functions in the same way across a wide array of environments, such as different text editors, shells and web browsers. The resulting tags are useful for quickly moving around in a large, deeply nested project.

The lcov-to-cobertura Python module converts code coverage report files in the lcov format to the XML format of Cobertura, a Java code coverage tool. It allows continuous integration servers like Jenkins to aggregate results and determine build stability.

Cscope is a text screen based source browsing tool. Although it is primarily designed to search C code (including lex and yacc files), it can also be used for C++ code.

Using cscope, you can easily search for where symbols are used and defined.

This package provides a wrapper around make to produce colored output.

Artistic Style is a source code indenter, formatter, and beautifier for the C, C++, C++/CLI, Objective‑C, C#, and Java programming languages.

GNU complexity provides tools for finding procedures that are convoluted, overly long or otherwise difficult to understand. This may help in learning or reviewing unfamiliar code or perhaps highlighting your own code that seemed comprehensible when you wrote it.

Beautify source code in many languages of the C family (C, C++, C#, Objective C, D, Java, Pawn, and Vala). Features:

• Indent and align code.

• Reformat comments (a little bit).

• Fix inter-character spacing.

• Add or remove parens / braces.

• Supports embedded SQL EXEC SQL stuff.

• Highly configurable - More than 600 configurable options.

GNU cflow analyzes C source files and produces a graph charting the control flow of the program. It can output the graph in several styles and in either the POSIX format or in an extended GNU format. cflow also includes a major mode for Emacs for examining the flowcharts that it produces.

amalgamate.py aims to make it easy to use SQLite-style C source and header amalgamation in projects.

SLOCCount is a set of the programs for counting source lines of code (SLOC) in large software systems. It can automatically identify and measure a wide range of programming languages. It automatically estimates the effort, time, and money it would take to develop the software, using the COCOMO model or user-provided parameters.

Xenon is a monitoring tool based on Radon. It monitors code complexity. Ideally, xenon is run every time code is committed. Through command line options, various thresholds can be set for the complexity of code. It will fail (i.e., it will exit with a non-zero exit code) when any of these requirements is not met.

scc provides a lines-of-code counter similar to tools like cloc and sloccount. It aims to be fast as possible while supporting COCOMO calculation and code complexity estimation.

Trio is a set of printf and string functions designed be used by applications with a focus on portability or with the need for additional features that are not supported by the standard stdio implementation.

Indent is a program that makes source code easier to read by reformatting it in a consistent style. It can change the style to one of several different styles such as GNU, BSD or K&R. It has some flexibility to deal with incomplete or malformed syntax. GNU indent offers several extensions over the standard utility.

The Automatic Component Toolkit (ACT) is a code generator that takes an instance of an Interface Description Language (IDL) file and generates a thin C89-API, implementation stubs, and language bindings of your desired software component.

make2graph creates a graph of dependencies from GNU Make. The output is a graphviz-dot file, a Gexf-XML file or a list of the deepest independent targets.

Sourcetrail is a free and open-source cross-platform source explorer that helps you get productive on unfamiliar source code. It includes support for C/C++, providing a graphical means for discovering symbols and their place in a project.

LCOV is an extension of gcov, a tool part of the GNU Binutils, which provides information about what parts of a program are actually executed (i.e., "covered") while running a particular test case. The extension consists of a set of Perl scripts which build on the textual gcov output to implement the following enhanced functionality such as HTML output.

RTags is a client/server application that indexes C/C++ code and keeps a persistent file-based database of references, declarations, definitions, symbolnames etc. There’s also limited support for ObjC/ObjC++. It allows you to find symbols by name (including nested class and namespace scope). Most importantly we give you proper follow-symbol and find-references support.

Universal Ctags generates an index (or tag) file of language objects found in source files for many popular programming languages. This index makes it easy for text editors and other tools to locate the indexed items. Universal Ctags improves on traditional ctags because of its multilanguage support, its ability for the user to define new languages searched by regular expressions, and its ability to generate emacs-style TAGS files.

Xenon is a monitoring tool based on Radon. It monitors code complexity. Ideally, xenon is run every time code is committed. Through command line options, various thresholds can be set for the complexity of code. It will fail (i.e., it will exit with a non-zero exit code) when any of these requirements is not met.