Open-source alternatives to Elvis

Vulture is a static analysis tool and linter designed to find unused variables, functions, and classes in Python source code. It operates as a dead code detector and unused code finder that scans source files to identify unreachable expressions and imports without executing the code. The tool employs a confidence-based heuristic scoring system to assign probability values to detections, helping to distinguish truly unused symbols from potential false positives. It further assists in pruning dead logic by sorting detected unused classes and functions by line count to prioritize the removal of

Identifies and prioritizes God Classes Highly Coupled classes, and Class Cycles in Java codebases you should refactor first.

Flake8 is a Python style checker and static analysis tool that identifies programmatic errors and violations of coding standards in source files. It serves as a linting wrapper that aggregates multiple checkers into a single interface, functioning as a pluggable framework for Python code analysis. The tool incorporates a cyclomatic complexity analyzer to measure the logical complexity of functions and identify code that requires refactoring. It is designed for extensibility, allowing the integration of custom plugins and rules through defined entry points. The system provides capabilities fo

Mix tasks to simplify use of Dialyzer in Elixir projects.

p3c is a Java static analysis tool and code quality linter designed to enforce professional coding guidelines and quality standards. It utilizes a set of custom rules based on the PMD engine to scan source code for style violations, performance bottlenecks, and potential bugs. The project is distributed as an IDE linting plugin that provides real-time feedback and warnings during development. It also includes functionality for pre-commit code quality gates, allowing modified files to be scanned and blocked if they violate defined rules before being committed to version control. The analysis

Coverage Reports for Elixir

dogsled is a Go static analysis tool to find assignments/declarations with too many blank identifiers.

GitHub action to run Go lint checks on PR event

A Github Action to statically validate Fastlane metadata for Android (supply).

Standalone twig linter.

Ruff is a high-performance static analysis and code formatting tool designed for Python. Built in Rust, it functions as a comprehensive engine that scans source code to detect programming errors, security vulnerabilities, and deviations from established coding standards. By parsing source code into a structured tree representation, it provides both automated linting and style enforcement across entire projects. The tool distinguishes itself through its speed and deep integration into the development lifecycle. It utilizes parallelized file processing to maximize throughput on large codebases

Shellharden is a shell script hardening tool and linter designed to improve the security and reliability of Bash scripts. It functions as an automated utility that rewrites scripts to follow industry standards for quoting and security practices. The project provides an optimizer and standardizer that replaces unsafe patterns and aliases with safer functional equivalents. It includes a syntax highlighter that uses visual markers and colorization to indicate vulnerabilities and areas where quoting corrections are required. The tool covers a broad range of capabilities including automated safet

A Github Action that runs pycodestyle and leaves a comment on your pull request with style errors.

prealloc is a Go static analysis tool to find slice declarations that could potentially be preallocated.

a ruby code dependency graph interactive visualizer

Discover files in need of refactoring.

␊ whitespace linter - Forces you to use empty lines!

Static analyzer and linter for Clojure code that sparks joy

A GitHub action to run hadolint and reports violations given a Dockerfile within a repository

Detect concurrency and memory bugs and possible panic locations in Rust projects

PHPStan CakePHP

dbcritic finds problems in a database schema.

Checkstyle is a Java static analysis tool and linter designed to identify and enforce coding standards and best practices. It functions as a code quality auditor and Javadoc validation tool, checking source code against configurable rulesets to ensure structural and stylistic consistency. The project allows for the creation of custom linting rules by extending a core API to inspect the abstract syntax tree. It further enables specialized validation through the use of XPath expressions to query the syntax tree for specific code patterns and violations. Capability areas include the enforcement

Github Action helps you check your code with PHP_CodeSniffer

Linter for markdown (with presets)