Cachet is a simple to use and easy to manage status page system and can be easily installed and used to track third party service letting your users know what's going on.
The project seems abandoned, and no active forks exist as far as I can see. E.g. https://github.com/CachetHQ/Cachet/issues/4314
Free & open source under MIT! Über fast, backwards compatible (IE8+), tiny, and simple status page built with Hugo. Compatible with Netlify & GitHub Pages. https://github.com/mistermantas/cstate.
Website/Server monitoring with fast notification via Web, SLACK or E-Mail on issues. What you get: 25 monitors, checked every 15 minutes. Now includes SSL-Certificate validation and port checks. Totally free!.
Stashboard is a status dashboard for APIs and software services. It's similar to the Amazon AWS Status Page or the Google Apps Status Page.This app doesn't have any features at the moment.Discontinued
The project seems to be no longer developed. Latest commit dates back on May 2014. Last version, 1.5.1, released in February 2012, can be still downloaded from the official website.
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.
ClearStatus is a free professional status page system. Setup in 5mn with a few clicks. Run for free with Netlify on your domain with SSL (or your preferred hosting). Twitter integration, Disqus commenting, sheduled maintenance, unlimited users.
PageFate is a free status page and incident management tool for your APIs, services or company. PageFate is multi user friendly and comes with two factor authentication via Google or Github for added security. It's a powerful, managed, heads-free alternative to StatusPage.