Dr. Link Check - Broken link checker with malware and parked domain detection
Google App Engine - A powerful platform to build web and mobile apps that scale automatically.
BrokenLinkCheck - Free Broken Link Checker / Online Dead Link Checking Tool - find bad hyperlinks
Dokku - Docker powered mini-Heroku in around 100 lines of Bash
DRKSpiderJava - DRKSpider is an open source website crawler (sitemap generator) and link checker. Features:
Google Cloud Functions - A serverless platform for building event-based microservices.