C#

• ccrawler - Built in C# 3.5 version. it contains a simple extention of web content categorizer, which can saparate between the web page depending on their content.

C/C++

• HTTrack - Highly extensible, highly scalable Web crawler. Pluggable parsing, protocols, storage and indexing.

Contributing

• Contribution Guidelines
• open an issue - web-scraper/pulls) with your additions.

Erlang

• ebot - Opensource Web Crawler built on top of a nosql database (apache couchdb, riak), AMQP database (rabbitmq), webmachine and mochiweb.

Go

• gocrawl - Polite, slim and concurrent web crawler.
• fetchbot - A simple and flexible web crawler that follows the robots.txt policies and crawl delays.

Java

• websphinx - Website-Specific Processors for HTML INformation eXtraction.
• Open Search Server - A full set of search functions. Build your own indexing strategy. Parsers extract full-text data. The crawlers can index everything.
• crawler4j - open source web crawler for Java which provides a simple interface for crawling the Web. Using it, you can setup a multi-threaded web crawler in few minutes.

Nodejs

• puppeteer - Headless Chrome Node API https://pptr.dev.
• Phantomjs - Scriptable Headless WebKit.
• node-crawler - Web Crawler/Spider for NodeJS + server-side jQuery.
• node-simplecrawler - Flexible event driven crawler for node.
• spider - Programmable spidering of web sites with node.js and jQuery.
• slimerjs - A PhantomJS-like tool running Gecko.
• casperjs - Navigation scripting & testing utility for PhantomJS and SlimerJS.
• zombie - Insanely fast, full-stack, headless browser testing using node.js.
• jsdom - A JavaScript implementation of the WHATWG DOM and HTML standards, for use with node.js
• xray - The next web scraper. See through the <html> noise.
• lightcrawler - Crawl a website and run it through Google lighthouse.
• nightmare - Nightmare is a high level wrapper for PhantomJS that lets you automate browser tasks

PHP

• Goutte - Goutte, a simple PHP Web Scraper.
• DiDOM - Simple and fast HTML parser.
• simple_html_dom - Just a Simple HTML DOM library fork.
• PHPCrawl - PHPCrawl is a framework for crawling/spidering websites written in PHP.
• Crawler - A library for Rapid Web Crawler and Scraper Development.

Python

• scrapy - Scrapy, a fast high-level web crawling & scraping framework for Python.
• gdom - gdom, DOM Traversing and Scraping using GraphQL.
• trafilatura - Library and command-line tool to extract metadata, main text, and comments.
• Scrapegraph-ai - An open source library for making scraping with the use of the AI

Ruby

• wombat - Lightweight Ruby web crawler/scraper with an elegant DSL which extracts structured data from pages.

Rust

• scraper - HTML parsing and querying with CSS selectors.
• reqwest - An ergonomic, batteries-included HTTP Client for Rust.