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2. OutWit Hub - Wikipedia

   en.wikipedia.org/wiki/OutWit_Hub

   OutWit Hub is a Web data extraction software application designed to automatically extract information from online or local resources. It recognizes and grabs links, images, documents, contacts, recurring vocabulary and phrases, rss feeds and converts structured and unstructured data into formatted tables which can be exported to spreadsheets or databases.

3. Web crawler - Wikipedia

   en.wikipedia.org/wiki/Web_crawler

   A Web crawler starts with a list of URLs to visit. Those first URLs are called the seeds.As the crawler visits these URLs, by communicating with web servers that respond to those URLs, it identifies all the hyperlinks in the retrieved web pages and adds them to the list of URLs to visit, called the crawl frontier.

4. Scrapy - Wikipedia

   en.wikipedia.org/wiki/Scrapy

   Scrapy (/ ˈ s k r eɪ p aɪ / [2] SKRAY-peye) is a free and open-source web-crawling framework written in Python. Originally designed for web scraping, it can also be used to extract data using APIs or as a general-purpose web crawler. [3] It is currently maintained by Zyte (formerly Scrapinghub), a web-scraping development and services company.

5. Heritrix - Wikipedia

   en.wikipedia.org/wiki/Heritrix

   Heritrix is a web crawler designed for web archiving.It was written by the Internet Archive.It is available under a free software license and written in Java.The main interface is accessible using a web browser, and there is a command-line tool that can optionally be used to initiate crawls.

6. 80legs - Wikipedia

   en.wikipedia.org/wiki/80legs

   Some rulesets for modsecurity block 80legs from accessing the web server completely, in order to prevent a DDoS. [ citation needed ] As it is a distributed crawler, it is impossible to block this crawler by IP.

7. PowerMapper - Wikipedia

   en.wikipedia.org/wiki/PowerMapper

   A site map is a comprehensive list of pages within a website's domain.It can serve three primary purposes: offering structured listings specifically designed for web crawlers such as search engines, [2] aiding designers during the website planning phase, and providing human-visible, typically hierarchical listings of site pages.