Open-source alternatives to Kaitai Struct

Ohm is a formal grammar parser generator and domain-specific language framework. It provides a system for defining custom languages to parse, validate, and extract data from input text, transforming raw strings into hierarchical abstract syntax trees based on specified formal rules. The project utilizes an Earley parsing algorithm, which allows it to support all context-free grammars, including those with left recursion and ambiguity, without requiring predefined operator precedence. It also includes a dedicated debugging toolkit for tracing and visualizing the step-by-step state transitions

DBML is a domain-specific language and schema definition language used for documenting database architecture and design. It provides a human-readable text format for defining database tables, columns, and relationships in a standardized way. The project functions as a relational schema parser and SQL schema generator. It transforms declarative design specifications into an abstract syntax tree for programmatic manipulation and converts these definitions into executable SQL statements across various database dialects. The system covers relational data modeling, database schema design, and arc

TrumpScript is a Python-based domain specific language and compiler extension that wraps the Python runtime to enforce custom grammar and vocabulary rules. It transforms a specialized, case-insensitive vocabulary and natural speech patterns into executable Python instructions. The implementation distinguishes itself through strict constraints on source code, including a variable name system that restricts identifiers to a predefined whitelist and a numeric parser that rejects any integer not exceeding one million. It further utilizes a token-filtering preprocessor to remove filler words and n

Taichi is a domain-specific programming language embedded in Python designed for high-performance numerical computing and computer graphics. It functions as a parallel compiler that translates high-level mathematical expressions into optimized machine instructions, enabling developers to write compute-intensive algorithms that execute across diverse hardware architectures, including CPUs, GPUs, and specialized accelerators. The project distinguishes itself through a hardware-agnostic execution layer that maps parallel operations to multiple backends such as CUDA, Metal, and Vulkan. By utilizi

InfluxDB is a specialized time series database platform engineered for the high-speed ingestion, compression, and retrieval of timestamped data at scale. It functions as a distributed metrics platform, providing the infrastructure necessary to organize and analyze massive volumes of time-stamped information to identify trends, patterns, and anomalies within complex data streams. The platform distinguishes itself through a functional dataflow engine that utilizes a specialized programming language for complex analytical transformations and automated tasks. This architecture is supported by a p

Sweet-core is a JavaScript source-to-source compiler and Lisp-style macro system. It functions as a syntax transformer that extends JavaScript by allowing the definition of custom syntax and operators during the compilation process. The system provides a framework for building domain-specific languages through hygienic, recursive macro expansion and the creation of new language constructs. It distinguishes itself by supporting custom operator definitions with configurable associativity and precedence to control expression evaluation. The compiler includes a specialized module system for mana

radare2 is a reverse engineering framework and binary analysis toolset. It functions as a multi-architecture disassembler, low-level binary debugger, and hexadecimal editor for inspecting executable structures and interpreting machine code when original source files are unavailable. The framework provides capabilities for decompiling machine instructions, performing symbolic analysis, and diffing binary files to identify structural changes across versions. It also includes a digital forensic analyzer and disk analyzer for browsing filesystem formats in userland. The toolset supports binary p

Prototool is a development toolkit for Protocol Buffers that provides a suite of tools for linting, formatting, and generating code from schema files. It functions as a system for managing the lifecycle of Protocol Buffer definitions through a command line interface. The toolkit distinguishes itself by providing a breaking change detector that compares different versions of definitions to identify wire or source incompatible changes. It also includes a gRPC client interface capable of invoking endpoints using JSON requests by dynamically compiling Protobuf definitions. The project covers bro

Rhai is an embedded scripting engine and dynamically typed language designed for integration into Rust applications. It functions as an abstract syntax tree compiler and native interop layer, allowing developers to map Rust types and functions into a scripting environment for bidirectional communication. The project serves as a framework for creating customizable domain-specific languages. It allows for the definition of custom operators, syntax, and restricted execution environments, enabling the creation of specialized languages with tailored functional sets. The engine covers a broad rang

Sonic Pi is a live coding music environment and algorithmic composition tool. It functions as a Ruby-based audio engine that allows users to compose and perform audio in real-time through a programmable interface. The software serves as interactive music education software, designed to teach computer science fundamentals and introductory programming concepts through the immediate feedback of sound generation. The system provides capabilities for real-time audio synthesis and the creation of complex musical patterns and sequences. It enables the generation of audio and the execution of music

Groovy is a JVM programming language and metaprogramming framework that provides a Java compatible environment for building applications. It functions as a dynamic scripting language and a tool for authoring domain-specific languages, allowing for the execution of custom scripts and the creation of specialized mini-languages with concise syntax. The project is distinguished by its ability to modify program behavior and class definitions through both compile-time and runtime metaprogramming. It utilizes a hybrid typing model that combines dynamic method resolution with optional static type che

Eve is a domain-specific language IDE and integrated logic editor that combines a custom programming language with a dedicated editor to define application logic and state. It functions as a reactive state management system that monitors state variables and automatically triggers functional responses. The environment features an integrated runtime-editor loop that couples the language execution environment with the text editor to accelerate the development cycle. This setup enables the definition of software behavior and state transitions using an embedded domain-specific language. The proje

Pest is a Rust parsing library and automatic parser generator that transforms formal grammar definitions into functional parsers. It specializes in Parsing Expression Grammar to recognize and structure complex text patterns, providing a system for context-free grammar parsing. The library implements zero-copy tokenization and static grammar compilation to reduce runtime overhead. It supports no-std runtime compatibility, allowing the parser to be compiled for embedded or bare-metal environments where a standard library is unavailable. The project covers a range of parsing capabilities, inclu

Nearley is a JavaScript parser toolkit and context-free grammar compiler. It functions as an Earley parser generator that transforms BNF-like grammar definitions into executable code capable of analyzing text and generating abstract syntax trees. The project is distinguished by its ability to handle any context-free grammar, including those with left recursion and ambiguity, by maintaining multiple valid derivations for a single input. It further supports incremental parsing, allowing input strings to be processed in chunks to provide partial results and real-time feedback. Beyond core parsi

Cake is a cross-platform build automation system and scripting framework that allows users to define software build pipelines using C# scripts. It functions as a CI/CD pipeline orchestrator and build runner, providing a strongly-typed domain-specific language to simplify the orchestration of compilation, testing, and packaging processes across Windows, Linux, and macOS. The system ensures reproducible build environments by pinning the versions of build tools, modules, and dependencies. It distinguishes itself by enabling a C# scripting workflow with full IDE support, including autocomplete, s

opentype.js is a JavaScript library for reading, writing, and manipulating OpenType, TrueType, and WOFF font files in both browser and server environments. It functions as a font parser and generator capable of extracting glyph data and metadata or creating new font files by defining glyph paths and metadata programmatically. The project provides specialized utilities for modifying font variation tables to control variable font properties and processing color layers and palettes via COLR and CPAL tables. It also includes a Bezier path generator that converts font glyphs and text strings into

Streem is a stream-based programming language and data pipeline orchestrator. It provides a domain-specific language for defining concurrent data flows, allowing users to link data sources to destinations through a sequence of operations that transform and filter individual stream elements. The system uses a custom script syntax to define data-flow connections and pipeline definitions. This allows for the orchestration of concurrent data processing where multiple pipeline stages execute simultaneously to move data elements through the system. The platform covers functional data transformatio

Grule is a business rule engine for Go that decouples complex decision-making logic from core application code. It provides a framework for defining, versioning, and executing business rules through a domain-specific language, allowing logic to be managed independently of the underlying software implementation. The engine distinguishes itself by utilizing a formal grammar-based parser and a Rete-inspired pattern matching algorithm to evaluate logic against data facts efficiently. It supports dynamic system modeling by enabling runtime updates to policies and providing thread-safe knowledge ba

Accelerate is a framework for high-performance array computing that provides a domain-specific language for expressing complex mathematical and parallel computations. By utilizing a declarative programming interface, it allows users to define high-level array transformations that are automatically translated into optimized machine code for diverse hardware architectures. The system distinguishes itself through a modular architecture that decouples high-level array operations from hardware-specific instructions. It employs just-in-time compilation and kernel fusion to transform programs into e

JSONExport is a multi-language code generator and JSON schema converter that transforms JSON data structures into strongly typed source code classes. It serves as an API response mapper, converting JSON objects into data transfer objects to automate the creation of model classes. The tool specializes in multi-language model synthesis, allowing users to define data models across different programming languages using a single JSON input. It generates class boilerplate, including constructors and accessors, and provides a preview pipeline to review the resulting source code before it is saved.

Mint is a front-end programming language and compiled web framework designed for building interactive user interfaces. It functions as a transpiler that converts a specialized domain-specific language into standard JavaScript and CSS for execution in a web browser. The toolchain enables type-safe UI development by utilizing static type analysis to validate data structures during the build phase. It organizes web interface logic into a component-based architecture, where encapsulated units synchronize internal state with the rendered view. The system covers a full compiled web toolchain, incl

ANTLR is a grammar-based code generator and multi-language parser generator used to design and implement custom languages. It functions as a toolkit for transforming formal language definitions into executable source code for processing structured text or binary files, while providing a framework for automatically constructing and traversing hierarchical parse trees. The project is distinguished by its ability to generate lexers and parsers in various target programming languages from a single shared grammar definition. It supports grammars containing direct left recursion and utilizes adapti

PegJS is a parsing expression grammar tool and JavaScript parser generator. It functions as a grammar compiler that transforms formal grammar specifications into executable JavaScript code for analyzing structured text and processing complex input strings. The system generates deterministic parsers that avoid the ambiguity of context-free grammars. It utilizes a packrat parsing model with memoization to ensure linear time complexity and employs recursive descent parsing to process input in a top-down hierarchical manner. The toolset supports the implementation of domain-specific languages an

Alda is a text-based music programming language and command-line tool for composing, playing, and live-coding musical scores. It functions as a MIDI composition engine that renders plain-text scores into audio output, and as a live coding environment where code entered in a read-eval-print loop produces real-time playback without restarting the interpreter. The system distinguishes itself through an event-driven playback engine that schedules timed note events, an instrument-attribute inheritance model that cascades properties like volume and tempo from global defaults to individual parts, an

Wuffs is a toolset for generating memory-safe, sandboxed parsers and decoders from domain-specific language specifications. It functions as a compiler that transforms these specifications into executable code for C, Go, or Rust, specifically designed to decode untrusted file formats while preventing buffer and integer overflows. The project employs a sandboxed execution model that prohibits system calls and manual memory management to ensure computations are side-effect free. It utilizes a refined type system and compile-time constraint verification to enforce memory safety, alongside saturat

This repository contains the design specifications for WebAssembly, serving as a technical standard for portable low-level code. It defines the binary format, instruction set, and execution semantics required to ensure consistent behavior across different hardware platforms. The project establishes the framework for a language compilation target, detailing the requirements for translating high-level programming languages into a low-level binary format. It includes a security model that defines operational rules and safety goals for executing untrusted binary code. The specifications cover th

ImHex is a professional-grade hex editor and binary data analysis platform designed for inspecting, modifying, and reverse engineering raw file contents. It functions as a schema-driven engine that interprets complex binary structures by applying custom definitions to map and visualize byte-level data. The platform distinguishes itself through a dedicated domain-specific language that allows users to define structural schemas for automated file parsing. This capability is supported by a dynamic plugin architecture and an event-driven registry, which enable the integration of external modules