ExtC is an Eclipse plug-in that is useful for locating large, noncohesive classes and for recommending how to split them into smaller, more cohesive classes. Its GUI enables querying a metrics database, displaying the dependency graphs of classes, and clustering a class's members. These clusters form the basis of the refactored classes.

Featureous is a tool for feature-centric analysis of Java software. The need for such a tool comes from the scattering and implicitness of implementations of user-observable behaviors of software (features) in the vast majority of object-oriented programs. Scattering and implicitness of features in code means that it becomes more difficult to find and understand only the relevant fragments of code when fixing a bug/modifying a feature/implementing new feature by reusing existing code. Featureous aims at improving this situation by providing a means of analyzing and modifying object-oriented programs in a feature-wise, rather than structure-wise, fashion.

Find it EZ is the leading universal software code search engine proven to impact productivity by over 40%. For IT professionals who work with a cross-section of tools including Oracle, SQL Server, MySQL or DB2 relational database development, Business Intelligence Software such as Crystal Reports, Xcelsius, Oracle Reports, Active Reports or SSRS and much more! Syntax aware scanning of Java, C/C++, C# and other .net languages, Python, PHP, Perl, Delphi, JavaScript, Ruby or Ada and many others. Even search your application database, XML, text or log files for data matches. Includes support for Excel spreadsheets and Word documents for a full 360 degree view of your entire software project. Pinpoint accurate and complete checklists to instantly boost your software development productivity.

FindBugs is a program which uses static analysis to look for bugs in Java code. FindBugs requires JRE (or JDK) 1.5.0 or later to run. However, it can analyze programs compiled for any version of Java, from 1.0 to 1.8.

Flay analyzes ruby code for structural similarities. Differences in literal values, names, whitespace, and programming style are all ignored. Code that flay reports as similar is a good candidate for refactoring.

FlexPMD is a tool that helps to improve code quality by auditing any AS3/Flex source directory and detecting common bad practices, such as:
* Unused code (functions, variables, constants, etc.)
* Inefficient code (misuse of dynamic filters, heavy constructors, etc.)
* Over-complex code (nested loops, too many conditionals, etc.)
* Over-long code (classes, methods, etc.)
* Incorrect use of the Flex component lifecycle (commitProperties, etc.)
A report is produced describing the violations of a given rule set. FlexPMD includes a rule set that is broad ranging and continually growing. It is also straightforward to create new rules and users are encouraged to do so

Flog is a tool build to analyze Ruby code complexity. It’s dead simple to run, and immediately provides useful metrics in the form of a “Flog score” per method. High scores are prime candidates for difficult testing and refactoring. Flog essentially scores an ABC metric: Assignments, Branches, Calls, with particular attention placed on calls.

Frama-C stands for Framework for Modular Analysis of C programs. Frama-C is a set of interoperable program analyzers for C programs.

FxCop is a code analysis tool that checks .NET managed code assemblies for conformance to the Microsoft .NET Framework Design Guidelines. It uses MSIL parsing, and callgraph analysis to inspect assemblies for more than 200 defects.

Gendarme is a extensible rule-based tool to find problems in .NET applications and libraries. Gendarme inspects programs and libraries that contain code in ECMA CIL format (Mono and .NET) and looks for common problems with the code, problems that compiler do not typically check or have not historically checked.