Skylos

ast-grep is a powerful tool designed for managing code at scale using Abstract Syntax Trees (AST). Think of it as a hybrid of grep, eslint, and codemod, with the ability to search, lint, and rewrite code based on its structure rather than plain text. It supports multiple languages and is designed to be extensible, allowing you to register custom languages.

Multi-language maintainability analyzer. Computes cyclomatic and cognitive complexity, Halstead volume, afferent/efferent coupling and maintainability index, detects communities in the dependency graph, and generates an explorable HTML report plus JSON, Markdown, SARIF and OpenMetrics output. Single fast binary with no runtime dependency, and a built-in MCP server so AI agents can query codebase structure before refactoring.

A linter and formatter to help you to improve copywriting, correct spaces, words, punctuations between CJK (Chinese, Japanese, Korean).

Checks your code and infra (various Git repositories supported, cloud stacks, CLI, Web Interface platform, integrationss available) for security and quality issues. Code Scanning/SAST/Linting using many tools/Scanners deduplicated with One Report (AI optional).

A language-agnostic linter that keeps code, documentation, and configuration in sync and enforces strict formatting and validation rules.

Statically generates a call graph image and displays it on screen.

Corgea is an AI-powered SAST scanner that helps developers find and fix insecure code. It finds business logic flaws, broken authentication, API vulnerabilities, and more with little false positives. Additionally, it automatically writes security fixes for them to approve. Corgea integrates with GitHub, GitLab, Azure DevOps, IDEs and CLI. It is free to try it.

Emerge is a source code and dependency visualizer that can be used to gather insights about source code structure, metrics, dependencies and complexity of software projects. After scanning the source code of a project it provides you an interactive web interface to explore and analyze your project by using graph structures.

Joern is a platform for analyzing source code, bytecode, and binary executables. It generates code property graphs (CPGs), a graph representation of code for cross-language code analysis. Code property graphs are stored in a custom graph database. This allows code to be mined using search queries formulated in a Scala-based domain-specific query language. Joern is developed with the goal of providing a useful tool for vulnerability discovery and research in static program analysis.

Copy/paste detector for programming source code. Finds duplicated blocks in 200+ file formats — JavaScript, TypeScript, Python, Java, C#, C/C++, Go, Rust, PHP, Ruby and more — using token-based detection. Supports configurable thresholds and ignore patterns, git blame integration, and reporters for console, HTML, JSON, Markdown, SARIF and badges. Runs via CLI, in CI pipelines, or as a library; bundled by MegaLinter and Codacy.

Automated translation platform for code comments and docstrings across 20+ file types. Eliminates language barriers in international software collaboration. Supports 100+ language pairs with syntax protection. Integrates into CI/CD pipelines like Ruff. 10-20x faster with concurrent processing.

Lizard is an extensible Cyclomatic Complexity Analyzer for many programming languages including C/C++ (doesn't require all the header files or Java imports). It also does copy-paste detection (code clone detection/code duplicate detection) and many other forms of static code analysis. Counts lines of code without comments, CCN (cyclomatic complexity number), token count of functions, parameter count of functions.

Mega-Linter can handle any type of project thanks to its 70+ embedded Linters, its advanced reporting, runnable on any CI system or locally, with assisted installation and configuration, able to apply formatting and fixes

Deterministic, zero-LLM code-health analysis. Scores every file 1-10 for defect risk, maintainability, and performance from 25 markers: McCabe complexity, LCOM4 cohesion, god classes, Rabin-Karp clone detection, change entropy, and untested hotspots. Adds a dependency graph, dead-code detection, git-history signals (churn, ownership, co-change), and concrete graph-aware refactoring plans. Ships as a CLI, an MCP server, and a VS Code extension across 15 languages.

Semantic version control CLI that provides entity-level diffs, blame, and impact analysis on top of git. Uses tree-sitter to parse 26 languages and builds a cross-file dependency graph with structural hashing. Commands include sem diff, sem blame, sem graph, and sem impact for blast-radius analysis of code changes.

A fast, open-source, static analysis tool for finding bugs and enforcing code standards at editor, commit, and CI time. Its rules look like the code you already write; no abstract syntax trees or regex wrestling. Supports 17+ languages.

Sigrid helps you to improve your software by measuring your system's code quality, and then compares the results against a benchmark of thousands of industry systems to give you concrete advice on areas where you can improve.

SonarQube for IDE (formerly SonarLint) is a free IDE extension available for IntelliJ, VS Code, Visual Studio, and Eclipse, to find and fix coding issues in real-time, flagging issues as you code, just like a spell-checker. More than a linter, it also delivers rich contextual guidance to help developers understand why there is an issue, assess the risk, and educate them on how to fix it.

Static Reviewer executes code checks according to the most relevant Secure Coding Standards, OWASP, CWE, CVE, CVSS, MISRA, CERT, for 40+ programming languages, using 1000+ built-in validation rules for Security, Deadcode & Best Practices Available a module for Software Composition Analysis (SCA) to find vulnerabilities in open source and third party libraries.

Combination of multiple linters to install as a GitHub Action.

Tencent Cloud Code Analysis (TCA for short, code-named CodeDog inside the company early) is a comprehensive platform for code analysis and issue tracking. TCA consist of three components, server, web and client. It integrates of a number of self-developed tools, and also supports dynamic integration of code analysis tools in various programming languages.

Linter for integrating annotated TODOs with your issue trackers

Modern repositories include many technologies, each with its own set of linters. With 30+ linters and counting, Trunk makes it dead-simple to identify, install, configure, and run the right linters, static analyzers, and formatters for all your repos.

Entity-level semantic merge driver for git. Resolves false conflicts that line-based merge produces when independent changes touch the same file. Parses functions and classes via tree-sitter, matches by name, and merges at the entity level. Benchmarked at 100% clean merges vs git's 48% on a 31-scenario suite.