Java 1-14 Parser and Abstract Syntax Tree for Java, including preview features to Java 13 –

☔️ interface for parsing, inspecting, transforming, and serializing content through syntax trees

Tools and libraries to glue C/C++ APIs to high-level languages

Markdown Abstract Syntax Tree format

Universal Syntax Tree used by @unifiedjs

💠 transform html with javascript plugins

Hypertext Abstract Syntax Tree format

Open-source code analysis platform for C/C++ based on code property graphs

Verible provides a SystemVerilog parser, style-linter, and formatter.

Abstract syntax tree builder for Delphi

BNF wrangling and railroad diagrams

Find in AST - Search and refactor code directly in Abstract Syntax Tree as you do with grep for strings

Symbolic parser generator for Julia language expressions using REDUCE algebra term rewriter

Intuitive S-expressions editing for Clojure(Script).

Natural Language Concrete Syntax Tree format

Python Abstract Syntax Tree viewer in Qt

Symbolic regression solver, based on genetic programming methodology.

Library for lexing and parsing D source code

JavaScript parser written in PHP that generates AST from your code according to ECMAScript specification

Mess up js code in a different way

utility to visit nodes

NER, syntax markup visualizations

ProLeap ANTLR4-based parser for COBOL

https://astexplorer.net with ES Modules support and Hot Reloading

Syntax Highlighter extension for Visual Studio Code (VSCode). Based on Tree-sitter.

Myna Parsing Library

A Ruby library for generating text with recursive template grammars.

Parse CSS, Sass, SCSS, and Less into a unist syntax tree

Library for SQL parsing, AST manipulation and SQL generation in F#