Thomas

Really simple plugin that allows you to easily add tooltips to your posts using the shortcode [wpetp].
It was made for some simple tooltips with text and/or images. For example if you want a way to add some information about a word in your post without forcing the user to leave the page to see them.
Feel free to ask for some features if you think I missed some.
Languages: English.

WP Easy Tooltips

Simple plugin that allows you to easily add tooltips to your posts using a shortcode.

Toile de Maître

An extension to make accessible tooltips easily using the awesome TippyJS library (https://atomiks.github.io/tippyjs/). 
Works with Gutenberg and classic editor.

Accessible Tooltips

An extension to make accessible tooltips easily using the awesome TippyJS library (https://atomiks.github.io/tippyjs/).

WP Easy Tooltips vs Accessible Tooltips