Open-source alternatives to Plato

Scc is a codebase analysis tool written in Go that calculates source lines of code, blank lines, and comments across hundreds of programming and markup languages. It functions as a source code metric engine, software complexity analyzer, and cost estimator. The project differentiates itself by providing a COCOMO cost estimator to predict development effort and financial costs, alongside tools to estimate the cost of regenerating a codebase using large language models. It also includes a Git repository metrics tool that correlates commit history with codebase metrics to identify hotspots, trac

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

ModernCppStarter is a pre-configured project boilerplate and bootstrapping environment for C++ libraries and executables. It provides a standardized set of CMake build configurations and templates to automate the initialization of new projects. The project integrates a comprehensive static analysis suite and documentation automation. It includes systems for enforcing code quality through sanitizers and analyzers, as well as a pipeline for generating and deploying technical documentation during project releases. The template covers broader development infrastructure, including dependency mana

Closure Compiler is a JavaScript build utility designed to transform, optimize, and validate source code for production environments. It functions as a minifier and transpiler, converting modern ECMAScript syntax into older, widely compatible versions to ensure reliable execution across diverse browsers. The tool distinguishes itself through a multi-pass optimization pipeline that performs complex refactoring, such as constant folding, function inlining, and variable renaming. It utilizes a static type inference engine to detect potential runtime errors and enforce type safety without requiri

This project is a CSS stylesheet compiler that transforms Sass source code into standard CSS. It provides the primary mechanism for converting styles while implementing syntax rules for web browsers and applications. The compiler supports a module-based dependency system that uses dedicated namespaces to provide encapsulation and prevent global scope collisions. It includes specialized engines for multi-model color conversion and advanced mathematical calculations, including trigonometry and logarithms. Capabilities cover a broad range of build and analysis tools, including the generation of

OpenRewrite is an automated refactoring engine and source-to-source migration framework. It uses a lossless semantic tree parser to represent source code as type-aware trees that preserve original whitespace and formatting, enabling precise and deterministic modifications. The project utilizes a declarative refactoring pipeline where sequences of transformations are defined in YAML to resolve breaking changes and technical debt. It features type-aware pattern matching and cross-language model mapping to apply similar refactoring patterns across different programming languages. The framework

Cppcheck is a static analysis tool and linter for C and C++ source code designed to detect programming errors, memory leaks, and security violations without executing the program. It functions as a bug detection engine and quality assurance tool to identify concurrency issues, type cast errors, and compliance with secure coding standards. The project provides a graphical user interface for selecting files and reviewing errors, alongside a linter for enforcing naming conventions and coding standards. It supports the creation of custom analysis rules using regular expressions to identify specif

Sourcetrail is an interactive source code explorer and visualizer designed for indexing and navigating relationships between symbols and structures across large, multi-language codebases. It functions as a static analysis indexer and code dependency visualizer that maps calls and dependencies between source files to help reveal project architecture. The tool enables multi-language project analysis by using a language-agnostic indexing system to track symbols across different programming languages within a single interface. It allows for the discovery of software architecture and the explorati

This project is a JetBrains IDE extension and source code colorizer that assigns distinct colors to nested pairs of brackets and braces. It serves as a code nesting visualizer for the IntelliJ platform and Android Studio to help identify matching pairs and clarify the structural hierarchy of source code. The plugin provides capabilities to apply rainbow color schemes to both brackets and variables to make them easier to track within a file. It also includes a color palette generator and options to exclude specific languages or file extensions from highlighting. The tool further assists with

indent-blankline.nvim is a visual utility for Neovim that improves document readability by rendering vertical alignment lines. This plugin serves as an indentation guide tool designed to clarify the structure of nested code blocks. The plugin utilizes Tree-Sitter parsing to function as a scope highlighter, drawing visual boundaries around variable and function scopes. This allows for the visualization of identifiers and block boundaries based on the language's syntax tree. The system manages code structure visualization through indentation guides and scope-based highlighting. It uses virtual

Larastan is a static analysis extension and type inference engine for PHP designed to detect bugs and type errors in Laravel applications. It extends PHPStan to resolve framework-specific patterns and magic methods, providing a rule-based scanning engine to audit code quality without executing the application. The tool specializes in Eloquent analysis, verifying that model properties, casts, and relationships align with database schemas and migrations. It tracks types across Eloquent collections, custom builders, and model factories to ensure type safety during database operations and iterati

This project is a static analysis engine and type checker designed for PHP codebases. It evaluates source code structure and type annotations to identify potential bugs, type mismatches, and logic errors without executing the application. By parsing code into an abstract syntax tree and applying a rule-based validation framework, it enforces code quality and safety standards across a project. What distinguishes this tool is its sophisticated type inference engine, which models dynamic language features, magic methods, and conditional types to maintain accuracy even in unconventional code. It

This project is a static analysis runner designed to identify bugs, performance bottlenecks, and stylistic inconsistencies within Go codebases. It functions as a comprehensive quality assurance suite that executes multiple analysis tools concurrently to provide a unified diagnostic report. By parsing source code into a structured representation, the tool enforces coding standards, validates import structures, and ensures consistent formatting across entire projects. The tool distinguishes itself through its ability to automate the remediation of identified issues, applying programmatic fixes

This project is a static analysis linter, code quality tool, and language auditor for Rust. It functions as an automated refactoring system designed to identify common mistakes and suggest idiomatic improvements for Rust source code. The tool identifies non-idiomatic patterns, performance bottlenecks, and code smells to improve the overall correctness and quality of the code. It specifically audits memory safety by flagging suspicious use of unsafe blocks and pointer manipulations and detects inefficient operations to optimize execution speed. The analysis surface covers coding style enforce

This project is a static analysis engine designed to identify patterns, enforce coding standards, and automate code quality improvements in software projects. By parsing source code into structured abstract syntax trees, it enables deep programmatic inspection and the automated remediation of identified programming issues. The engine functions as a pluggable linting framework, allowing developers to extend its core capabilities through a modular architecture. Users can inject custom rules, parsers, and processors to support non-standard file formats or domain-specific logic. This extensibilit

Crab is a memory-safe systems programming language and ahead-of-time compiler designed for high-performance software. It utilizes a type system based on strict ownership and borrowing rules to prevent memory access errors at compile time. The toolchain includes an automated documentation generator that produces technical reference manuals and API guides by parsing structured source code annotations. It also features a dependency management tool to resolve external library graphs and ensure consistent project builds. The project covers software build automation, static type checking, and mult

This project is an AI-powered code reviewer and static analysis server that identifies low-quality files and generates automated critiques. It functions as an automated quality scoring tool that evaluates source code structure and complexity through local parsing. The system utilizes a standardized context protocol to stream analysis results to AI agents and editors. It integrates large language models to produce automated reviews and suggestions for improvement based on quantitative quality metrics. The tool includes a weight-based scoring engine and an asynchronous analysis pipeline for pr

Rushstack is a comprehensive toolset for managing large-scale TypeScript monorepos, providing a framework for build pipeline automation, dependency coordination, and static analysis. It functions as an incremental build orchestrator and management system designed to maintain consistency and performance across multiple packages in a shared workspace. The system distinguishes itself through an execution model based on directed acyclic graphs and content-hash-based incrementalism, which ensures only affected projects are rebuilt. It further optimizes development workflows via remote build artifa

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

This project is a comprehensive guide and educational resource for the TypeScript language. It covers the fundamental principles of the language, including its structural type system, static type analysis, and the process of transpiling typed source files into JavaScript. The material details how to model complex data and reusable type logic using generics, conditional types, and mapped types. It also explains the use of declaration files to provide type safety for external JavaScript libraries and the integration of type checking into existing JavaScript projects via JSDoc annotations. The

SwiftFormat is a tool for the Swift language that functions as a code formatter, linter, and refactoring utility. It automatically applies consistent style rules and visual formatting to source files to ensure a uniform appearance across a project. The project differentiates itself by providing both a command-line interface for batch processing and an Xcode extension for integration directly into the development environment. It includes specialized capabilities for modernizing legacy API usage, simplifying language constructs, and inferring formatting options by analyzing an existing codebase

This is a static analysis linter and code quality tool for Go. It analyzes source code to identify common coding errors, style mistakes, and inconsistencies with language conventions. The tool is designed for integration with text editors and integrated development environments, exporting linting results in formats that support quickfix menus. Its capabilities include Go static analysis and source code quality assurance across files and packages. The system utilizes a static analysis pipeline and rule-based pattern matching to identify structural patterns that violate predefined coding stand

This is an open-source Android application that serves as a reference implementation for modern app architecture. It demonstrates a modular, testable structure built with Kotlin, Coroutines, and Jetpack libraries, organized into independent feature modules that each follow Clean Architecture and the MVVM pattern. The project enforces coding standards through an automated static analysis pipeline that integrates linting, formatting checks, and code quality tools directly into the build process, failing the build on any violations. It uses reusable Gradle convention plugins to standardize build

Infer is a static analysis toolset for Java, C, C++, and Objective-C designed to detect memory leaks, null dereferences, and resource bugs. It functions as a multi-language bug finder that identifies race conditions, deadlocks, and memory safety issues by translating source code into a common intermediate representation for analysis. The project distinguishes itself through an inter-procedural data flow analyzer that tracks movement between sources and sinks to detect tainted flows and generate data flow graphs. It also includes a framework for verifying temporal properties and reachability u

Flow is a JavaScript static type checker and AST parser that identifies type errors and prevents runtime failures through static annotations. It functions as a code intelligence engine and a static analysis linter to identify unsafe coding patterns and enforce consistency across a codebase. The project includes a type annotation stripper that removes static type signatures from source code, ensuring the resulting JavaScript is compatible with any runtime environment. It also provides a parser that converts typed JavaScript into an abstract syntax tree conforming to the ESTree specification.

JSHint is a JavaScript static analysis tool and linter designed to detect errors and enforce coding standards. It functions as a syntax validator that scans source code to identify potential logic problems and programming mistakes before the code is executed. The tool provides a command line interface for analyzing files and directories. It supports the export of analysis results into standardized formats such as Checkstyle for integration with external build tools. Analysis is managed through a system of linting rule management and environment global configuration. This includes the ability

This project provides a collection of reference materials, guides, and cheatsheets designed to optimize the Android development workflow. It serves as a comprehensive resource for implementing best practices in application building, debugging, and user interface design. The repository covers specialized techniques for build optimization, including methods to reduce binary sizes and accelerate compilation. It also provides detailed references for device debugging, memory leak detection, and the application of Material Design principles. The project further details productivity enhancements fo