Dawi

This plugin disables the WordPress update notifications, as well as update notifications of different plugins. It is ideal to deliver a complete WordPress and not bother the user with alerts. Silence!
<h4>Please note!</h4>
It’s very important that you keep your WordPress plugins up to date. If you don’t, your blog or website could be susceptible to security vulnerabilities or performance issues. If you use this plugin, you must make sure you keep yourself up to date with new releases of your active plugins and update them as new versions are released.

Silence!

Disables the plugin update checking and notification system.

Ciprian Craciun

This plugin disable plugins, themes and core updates for WordPress and also the notifications.
It’s very important that you keep your WordPress theme, core and plugins up to date. If you don’t, your blog or website could 
be susceptible to security vulnerabilities or performance issues.
If you use this plugin, make sure you keep yourself up to date with new releases of your active WordPress version, plugins 
and themes and update them as new versions are released (simply by deactivating this plugin for a short time).

Disable Plugins, Themes and Core Updates

This plugin disable plugins, themes and core updates for WordPress and also the notifications.

Silence! vs Disable Plugins, Themes and Core Updates