Crazy Egg is a user behavior analytics and heatmap tool designed to help website owners understand how visitors interact with their pages and improve conversions through visual insights.

DA PA Checker is an SEO tool that lets you check Domain Authority (DA) and Page Authority (PA) for one or multiple URLs at once. These metrics, originally developed by Moz, help estimate how strong a website or a specific page is likely to rank in search engines.

The tool you shared focuses on bulk checking, which makes it useful for quick SEO analysis, competitor research, and link-building decisions.

Screaming Frog is a technical SEO tool best known for its website crawler, Screaming Frog SEO Spider, which scans websites the way search engines do. It helps identify technical SEO issues like broken links, duplicate content, missing meta tags, crawl errors, and site structure problems. The tool is widely used by SEO professionals and agencies for in-depth site audits.