Submarine
A minimalist, self-hosted web service for checking the status of network devices

Submarine is a simple self-hosted web utility that checks connectivity to a list of user-configured network targets. These targets can be just about device that the server hosting Subarmine has access to, including devices on the local network. If you have a large quantity of devices on your network, and you want to be able to quickly keep tabs on them, Submarine is a great way to do so.
Private
Submarine is completely self hosted, and doesn't collect or share any analytics with third-party services.
Lightweight
Submarine is incredibly lightweight, and can be viewed from practically any device with a web-browser.
Responsive
The Submarine interface adapts to all sorts of screen sizes using pure CSS, meaning even devices that don't support JavaScript work great.
Accessible
The simple design of Submarine makes in inherently accessible. All of the webpages are clear and easy to read, even with visual impairments.
Easy
After completing the initial installation process, Submarine doesn't require significant technical experience to use.
Customizable
Submarine allows administrators to configure and customize the features, functionality, and theme through a conveinent web interface.
Downloads
Since this program is written in PHP, the "Web" and "Source" downloads will be identical. Either of these downloads can be hosted on any compatible webserver, regardless of the operating system.
1.0
