AngleSharp is a .NET library that gives you the ability to parse angle bracket based hyper-texts like HTML, SVG, and MathML. XML without validation is also supported by the library. An important aspect of AngleSharp is that CSS can also be parsed. The included parser is built upon the official W3C specification. This produces a perfectly portable HTML5 DOM representation of the given source code and ensures compatibility with results in evergreen browsers. Also standard DOM features such as querySelector or querySelectorAll work for tree traversal.

AngleSharp - The ultimate angle brackets parser library parsing HTML5, MathML, SVG and CSS to construct a DOM based on the official W3C specifications

A markdown parser and compiler. Built for speed. It is a low-level compiler for parsing markdown without caching or blocking for long periods of time. It works in a browser, on a server, or from a command line interface (CLI). 

Marked - A markdown parser and compiler. Built for speed.

Bhai lang is a toy programming language written in Typescript. hi bhai is the entrypoint for the program and all program must end with bye bhai. Anything outside of it will be ignored.

Bhai Lang- A toy programming language written in Typescript

TagSoup, a SAX-compliant parser written in Java that, instead of parsing well-formed or valid XML, parses HTML as it is found in the wild: poor, nasty and brutish, though quite often far from short. TagSoup is designed for people who have to process this stuff using some semblance of a rational application design. TagSoup also includes a command-line processor that reads HTML files and can generate either clean HTML or well-formed XML that is a close approximation to XHTML.

TagSoup - SAX-compliant parser in Java

ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files. It's widely used to build languages, tools, and frameworks. From a grammar, ANTLR generates a parser that can build and walk parse trees. Twitter search uses ANTLR for query parsing, with over 2 billion queries a day. 
 
The languages for Hive and Pig, the data warehouse and analysis systems for Hadoop, both use ANTLR. Lex Machina uses ANTLR for information extraction from legal texts. Oracle uses ANTLR within SQL Developer IDE and their migration tools. NetBeans IDE parses C++ with ANTLR. The HQL language in the Hibernate object-relational mapping framework is built with ANTLR.

ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files. It's widely used to build languages, tools, and frameworks. From a grammar, ANTLR generates a parser that can build and walk parse trees. Twitter search uses ANTLR for query parsing, with over 2 billion queries a day. 


ANTLR - ANother Tool for Language Recognition

This is a parser for HTTP messages written in C. It parses both requests and responses. The parser is designed to be used in performance HTTP applications. It does not make any syscalls nor allocations, it does not buffer data, it can be interrupted at anytime. Depending on your architecture, it only requires about 40 bytes of data per message stream (in a web server that is per connection). 

http-parser - http request/response parser for c

documentation.js is a documentation tool for mordern JavaScript.  It Supports modern JavaScript: ES5, ES2017, JSX, Vue and Flow type annotations. It provides customizable output: HTML, JSON, Markdown, and more.

documentation.js - Documentation for modern JavaScript

PostCSS is a tool for transforming styles with JS plugins. These plugins can lint your CSS, support variables and mixins, transpile future CSS syntax, inline images, and more. It is used by industry leaders including Wikipedia, Twitter, Alibaba, and JetBrains. The Autoprefixer PostCSS plugin is one of the most popular CSS processors.

PostCSS - Transforming styles with JS plugins

parse5 provides nearly everything you may need when dealing with HTML. It's the fastest spec-compliant HTML parser for Node to date. It parses HTML the way the latest version of your browser does. It has proven itself reliable in such projects as jsdom, Angular2, Polymer and many more.

parse5 - HTML parsing / serialization toolset for Node.js

<p style="box-sizing: border-box; border: 0px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-variant-alternates: inherit; font-weight: 400; font-stretch: inherit; line-height: inherit; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-optical-sizing: inherit; font-kerning: inherit; font-feature-settings: inherit; font-variation-settings: inherit; font-size: 16px; margin: 0px 0px 1em; padding: 0px; vertical-align: baseline; color: rgb(36, 41, 46); letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">Comby provides a lightweight way of matching syntactic structures of a program&rsquo;s parse tree, like expressions and function blocks. Comby is language-aware and understands basic syntax of code, strings, and comment syntax in many languages.
<p style="box-sizing: border-box; border: 0px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-variant-alternates: inherit; font-weight: 400; font-stretch: inherit; line-height: inherit; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-optical-sizing: inherit; font-kerning: inherit; font-feature-settings: inherit; font-variation-settings: inherit; font-size: 16px; margin: 0px 0px 1em; padding: 0px; vertical-align: baseline; color: rgb(36, 41, 46); letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">Comby works by defining general parsers for code constructs like balanced <code>(...)</code>, <code>{...}</code>, and <code>[...]</code>, as well as string literals and comments. It doesn&rsquo;t implement a full parser for every language, but rather a more general grammar so that it works on a lot of languages (just like regular expressions work on the text of every language).
<p style="box-sizing: border-box; border: 0px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-variant-alternates: inherit; font-weight: 400; font-stretch: inherit; line-height: inherit; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-optical-sizing: inherit; font-kerning: inherit; font-feature-settings: inherit; font-variation-settings: inherit; font-size: 16px; margin: 0px 0px 1em; padding: 0px; vertical-align: baseline; color: rgb(36, 41, 46); letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">&nbsp;

Comby - A code rewrite tool for structural search and replace that supports every language

JFlex is a lexical analyzer generator (also known as scanner generator). It is also a rewrite of the very useful tool JLex which was developed by Elliot Berk at Princeton University. JFlex is designed to work together with the LALR parser generator CUP by Scott Hudson, and the Java modification of Berkeley Yacc BYacc/J by Bob Jamison. It can also be used together with other parser generators like ANTLR or as a standalone tool.

Jflex

Hpricot is a fast, flexible HTML parser. Hpricot can be handy for reading broken XML files, since many of the same techniques can be used. If a quote is missing, Hpricot tries to figure it out. If tags overlap, Hpricot works on sorting them out. Source code location: <A HREF="http://github.com/hpricot/hpricot" target="_blank">http://github.com/hpricot/hpricot</A> 
 <UL>
	<LI>Hpricot is a standalone library. It requires no other libraries. Just Ruby!</LI>
	<LI>Hpricot works hard to sort out bad HTML and pays a small penalty in order to get that right.</LI>
	<LI>If you can see it in Firefox, then Hpricot should parse it.</LI>
	<LI>Primarily, Hpricot is used for reading HTML and tries to sort out troubled HTML by having some idea of what good HTML is.</LI>
 </UL>

Hpricot is a fast, flexible HTML parser. Hpricot can be handy for reading broken XML files, since many of the same techniques can be used. If a quote is missing, Hpricot tries to figure it out. If tags overlap, Hpricot works on sorting them out.

Hpricot - HTML parser for Ruby

TagSoup is a library for parsing HTML/XML. It supports the HTML 5 specification, and can be used to parse either well-formed XML, or unstructured and malformed HTML from the web. The library also provides useful functions to extract information from an HTML document, making it ideal for screen-scraping. The library provides a basic data type for a list of unstructured tags, a parser to convert HTML into this tag type, and useful functions and combinators for finding and extracting information.

TagSoup is a library for parsing HTML/XML. It supports the HTML 5 specification, and can be used to parse either well-formed XML, or unstructured and malformed HTML from the web. The library also provides useful functions to extract information from an HTML document, making it ideal for screen-scraping.

TagSoup - HTML/XML parser for Haskell

JTidy is a Java port of HTML Tidy, a HTML syntax checker and pretty printer. Like its non-Java cousin, JTidy can be used as a tool for cleaning up malformed and faulty HTML. In addition, JTidy provides a DOM interface to the document that is being processed, which effectively makes you able to use JTidy as a DOM parser for real-world HTML.

JTidy - HTML parser and pretty printer in Java

Datejs is an open source JavaScript Date library for parsing, formatting and processing. Comprehensive, yet simple, stealthy and fast. Datejs has passed all trials and is ready to strike. Datejs doesn’t just parse strings, it slices them cleanly in two.

Datejs - A JavaScript Date Library

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