LinkChecker - LinkChecker is a free, GPL licensed website validator.
Dr. Link Check - Broken link checker with malware and parked domain detection
DRKSpiderJava - DRKSpider is an open source website crawler (sitemap generator) and link checker. Features:
Dead Link Checker - Check for broken links on any website
SuperSend.io - Automate Cold Outreach Across Email, Linkedin and Twitter.
Pulno - SEO Audit and Website Analysis. Pull up your SEO.