In the blog post "4 Tools for Web Scraping in Node.js," Sam Agnew explores different libraries available for JavaScript developers to scrape and parse website data when dedicated REST APIs are not available. The tools include jsdom, Cheerio, Puppeteer, and Playwright, each offering unique advantages depending on the web scraping needs. Jsdom and Cheerio are more lightweight options for handling static data, with Cheerio being faster due to its jQuery-like API. Puppeteer and Playwright are headless browser scripting libraries that offer more versatility, allowing interaction with dynamic web applications, with Playwright supporting multiple browsers. Agnew emphasizes the importance of checking websites' Terms of Service before scraping and highlights the potential for changes in HTML structure to disrupt scraping scripts. The article encourages developers to explore these tools to harness the vast data available on the web for their projects.