Erwan jegouzo

This plugin helps you deactivate the update for the plugins you don’t want to update! 
Let’s say you are working on a website and you modified several plugins to make them work the way you want them to. 
If you (or your client) later updates the plugin, all the changes you made will be lost. 
This plugin will help you in solving this issue. 
It will let you select for which plugins you want to disable updates. You can then leave a note to explain the changes you made.
Please note: 
It’s strongly recommended that you keep your WordPress plugins up to date. 
If you skip plugin updates, you could expose your website to critical security issues.

Plugin updates blocker

Lets you disable unwanted updates for plugins

Garrett Grimm

RichH

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Use this plugin to easily create links to simple popup windows. It supports multiple popup links on posts/pages/widgets and window positioning/centering options.

Simple Popup Plugin

This plugin makes it easy to create a simple, modifiable popup window.

Plugin updates blocker vs Simple Popup Plugin