HAZOTA

This plugin publishes a simple endpoint at <code>/kmut.txt</code> on your site to expose your account identifier for seamless integration with KissMyUpTime’s completely free uptime monitoring service.
A <a href="https://kissmyuptime.com" rel="nofollow ugc">KissMyUpTime</a> account is required, and you can create one for free – no personal data required.
KissMyUpTime offers a real-time interface and instant notifications across all your devices, along with precise uptime percentage calculations, an unlimited number of checks, boostable intervals, and multiple nodes around the world.

KissMyUpTime

Helps you easily integrate KissMyUpTime's completely free uptime monitoring service with your WordPress site.

Lucian Apostol

You can add the plugin as a widget, dragging and dropping it from the WordPress administration panel, Appearance->Widgets section, or with a short tag directly in your blog posts or pages using the [calotor] shortcode.
You can also add it directly into your template files.

Calotor Calorie Counter

Provide your visitors the ability to figure out their basal metabolic rate, based on their age, sex and weight.

KissMyUpTime vs Calotor Calorie Counter