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.
statuspage - A simple self-hosted status page site with an API written in Django under the BSD license.
Trendy 404s - A set of creative templates for your 404s
Superblog - Superblog is a blazing fast alternative to WordPress and Medium. You can focus on writing content instead of SEO audits, speed, and design.
FourZeroFour - Showcase of the best error pages on the web.
404 Illustrations - Open-source catchy illustrations for perfect error pages