parse

ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.

Rust parser combinator framework

A querystring parser and serializer with nesting support

SwiftSoup: Pure Swift HTML Parser, with best of DOM, CSS, and jquery (Supports Linux, iOS, Mac, tvOS, watchOS)

Makes life working with units of measurement just a little bit better.

Html Agility Pack (HAP) is a free and open-source HTML parser written in C# to read/write DOM and supports plain XPATH or XSLT. It is a .NET code library that allows you to parse "out of the web" HTML files.

The Dart/Flutter SDK for Parse Platform

A Python library to read metadata from images created by Stable Diffusion.