StatusPage.io - StatusPage.io is the best way for web infrastructure, developer API, and SaaS companies to get set up with their very own status page in minutes. Integrate public metrics and allow your customers to subscribe to be updated automatically.
404 Illustrations - Open-source catchy illustrations for perfect error pages
FourZeroFour - Showcase of the best error pages on the web.
Marketing Inspo - Get inspired by this collection of marketing examples.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
statuspage - A simple self-hosted status page site with an API written in Django under the BSD license.