Scrapy - Scrapy | A Fast and Powerful Scraping and Web Crawling Framework
DataGrab.io - DataGrab - Extract web data easily and scalably without coding.
Apache Nutch - Apache Nutch is a highly extensible and scalable open source web crawler software project.
Outscraper - Scrape Google Maps Places, Business Reviews, Photos, Play Market Reviews, and more. Get any public data from the internet by applying cutting-edge technologies. Web Tools & API's.
Heritrix - Heritrix is the Internet Archive's open-source, extensible, web-scale, archival-quality web...
ScrapingBee - ScrapingBee is a Web Scraping API that handles proxies and Headless browser for you, so you can focus on extracting the data you want, and nothing else.