kengher

Broadcast simple, important alerts across your multisite network. Also great for single sites.
Features of Site Alert: 
* Display alert(s) in the Homepage with option to show in all pages of a site. 
* Native WordPress WYSIWYG message creation box for simplicity with media support. 
* Choice of hardcoded at the different parts of the page, or make it a pop-up modal. 
* Indicate different priority levels (colors) and icons. 
* Set a date range to publish/unpublish the alert.
Features as a Network Admin 
* Show alert across all all sites in your multisite network. 
* Exclude alert(s) from certain sites. 
* Site Groups manager to provide easier bulk exclusions.

Super Simple Site Alert

Broadcast simple, important alerts across your multisite network. Also great for single sites.

mrdigital

Use this plugin to display an image popup for promotions, alerts, or messages. Key features include: 
– Simple activation/deactivation of the popup. 
– Choose an image from your media gallery. 
– Set a unique Popup ID to control repeat appearances. 
– Optionally link the popup image to any URL. 
– Control how frequently the popup reappears using an expiry time. 
– Delay popup display by a set number of seconds. 
– NEW: Conditionally display the popup only on selected posts or pages. 
– NEW: Enhanced accessibility: 
 – Close popup with the “Escape” key. 
 – Focus management for keyboard navigation. 
 – Aria attributes and roles for screen readers. 
– NEW: Improved admin UI so that the conditional display options only appear if enabled.

Simple Image Popup

Prosta i szybka bez zbędnych funkcji. Polecam :)

Polecam

A simple way to show a popup image on your website with various enhancements including conditional display and accessibility features.

Super Simple Site Alert vs Simple Image Popup