Scrapy - Web crawling & scraping framework for Python

•    Python

Scrapy is a fast high-level web crawling and web scraping framework, used to crawl websites and extract structured data from their pages. It can be used for a wide range of purposes, from data mining to monitoring and automated testing.

Storm Crawler - Web crawler SDK based on Apache Storm

•    Java

StormCrawler is an open source collection of resources for building low-latency, scalable web crawlers on Apache Storm. StormCrawler is a library and collection of resources that developers can leverage to build their own crawlers. The good news is that doing so can be pretty straightforward. Often, all you'll have to do will be to declare StormCrawler as a Maven dependency, write your own Topology class (tip : you can extend ConfigurableTopology), reuse the components provided by the project and maybe write a couple of custom ones for your own secret sauce.

ferret - Declarative web scraping

•    Go

ferret is a web scraping system. It aims to simplify data extraction from the web for UI testing, machine learning, analytics and more. ferret allows users to focus on the data. It abstracts away the technical details and complexity of underlying technologies using its own declarative language. It is extremely portable, extensible, and fast. It as the ability to scrape JS rendered pages, handle all page events and emulate user interactions.

pholcus - [Crawler for Golang] Pholcus is a distributed, high concurrency and powerful web crawler software

•    Go

[Crawler for Golang] Pholcus is a distributed, high concurrency and powerful web crawler software.

webmagic - A scalable web crawler framework for Java.

•    Java

A crawler framework. It covers the whole lifecycle of crawler: downloading, url management, content extraction and persistent. It can simply the development of a specific crawler.

headless-chrome-crawler - Distributed crawler powered by Headless Chrome

•    Javascript

Crawlers based on simple requests to HTML files are generally fast. However, it sometimes ends up capturing empty bodies, especially when the websites are built on such modern frontend frameworks as AngularJS, React and Vue.js. Note: headless-chrome-crawler contains Puppeteer. During installation, it automatically downloads a recent version of Chromium. To skip the download, see Environment variables.

Arachnode.net

•    CSharp

An open source .NET web crawler written in C# using SQL 2005/2008. Arachnode.net is a complete and comprehensive .NET web crawler for downloading, indexing and storing Internet content including e-mail addresses, files, hyperlinks, images, and Web pages.

awesome-crawler - A collection of awesome web crawler,spider in different languages

A collection of awesome web crawler,spider and resources in different languages.

grab-site - The archivist's web crawler: WARC output, dashboard for all crawls, dynamic ignore patterns

•    Python

grab-site is an easy preconfigured web crawler designed for backing up websites. Give grab-site a URL and it will recursively crawl the site and write WARC files. Internally, grab-site uses wpull for crawling. a dashboard with all of your crawls, showing which URLs are being grabbed, how many URLs are left in the queue, and more.

colly - Elegant Scraper and Crawler Framework for Golang

•    Go

Colly provides a clean interface to write any kind of crawler/scraper/spider. With Colly you can easily extract structured data from websites, which can be used for a wide range of applications, like data mining, data processing or archiving.

Soup - Web Scraper in Go, similar to BeautifulSoup

•    Go

soup is a small web scraper package for Go, with its interface highly similar to that of BeautifulSoup.

ruia - Async Python 3.6+ web scraping micro-framework based on asyncio.

•    Python

Ruia is an async web scraping micro-framework, written with asyncio and aiohttp, aims to make crawling url as convenient as possible.

crawler - A high performance web crawler in Elixir.

•    Elixir

A high performance web crawler in Elixir, with worker pooling and rate limiting via OPQ. Below is a very high level architecture diagram demonstrating how Crawler works.

Norconex HTTP Collector - A Web Crawler in Java

•    Java

Norconex HTTP Collector is a web spider, or crawler that aims to make Enterprise Search integrators and developers's life easier. It is Portable, Extensible, reusable, Robots.txt support, Obtain and manipulate document metadata, Resumable upon failure and lot more.

colly - Fast and Elegant Scraping Framework for Gophers

•    Go

Colly provides a clean interface to write any kind of crawler/scraper/spider.With Colly you can easily extract structured data from websites, which can be used for a wide range of applications, like data mining, data processing or archiving.

gocrawl - Polite, slim and concurrent web crawler.

•    Go

gocrawl is a polite, slim and concurrent web crawler written in Go.For a simpler yet more flexible web crawler written in a more idiomatic Go style, you may want to take a look at fetchbot, a package that builds on the experience of gocrawl.

frontera - A scalable frontier for web crawlers

•    Python

Frontera is a web crawling framework consisting of crawl frontier, and distribution/scaling primitives, allowing to build a large scale online web crawler. Frontera takes care of the logic and policies to follow during the crawl. It stores and prioritises links extracted by the crawler to decide which pages to visit next, and capable of doing it in distributed manner.

grab - Web Scraping Framework

•    Python

Project Grab is not abandoned but it is not being actively developed. At current time I am working on another crawling framework which I want to be simple, fast and does not leak memory. New project is located here: https://github.com/lorien/crawler First, I've tried to use mix of asyncio (network) and classic threads (parsing HTML with lxml on multiple CPU cores) but then I've decided to use classic threads for everything for the sake of simplicity. Network requests are processed with pycurl because it is fast, feature-rich and supports socks5 proxies. You can try new framework but be aware it does not have many features yet. In particular, its options to configure network requests are very pure. If you need some option, feel free to create new issue.

Nutch - Highly extensible, highly scalable Web crawler

•    Java

Nutch is open source web-search software. It builds on Lucene Java, adding web-specifics, such as a crawler, a link-graph database, parsers for HTML and other document formats, etc.

node-crawler - Web Crawler/Spider for NodeJS + server-side jQuery ;-)

•    Javascript

Web Crawler/Spider for NodeJS + server-side jQuery ;-)