Mario Peshev

DevriX

Stanko Metodiev

Sven Hofmann

Display a notice when working on a localhost site on staging environment, based on your settings and adjustments
Activate the plugin and see a yellow notice bar indicating that you’re working on localhost.
Super helpful whenever you’re cloning a production website with virtual hosts using the same domain name, and are not sure which site are you editing. Visible both in the admin area, and the frontend to all site visitors.

DX localhost

Display a yellow notice box when you're working on localhost

Chris Allen

Poodle Plugins

This plugin makes it easy to distinguish between your local development site, and your live site. 
I created this because I often use a local duplicate of my live site, for development, with the same DB, and the same URL.
I needed a quick & easy way of distinguishing between my live and development sites at a glance. This plugin acheives that in the simplest way possible.
There are settings for colour, positioning and the text displayed on the badge. It is also possible to add a link onto the badge.

WP Dev Flag

Shows a floating badge on the front end, to visually distinguish your development site from production.

DX localhost vs WP Dev Flag