Cyklodev WP Settings plugin allow you to modify Wordpress core functionnalities who aren't in the standard backoffice.

Provides single-click plugin upgrades in WP 2.3 and up, visually marks plugins that have update notifications enabled, allows to easily install new plugins and themes, lets you control if and when WordPress checks for updates... and so on.

Notify Update par JM Créa vous notifie par email et sms (pour les abonnés freemobile) lors d’une mise à jour de votre Wordpress.

The plugin allows you to easily control some tweaks of the WordPress admin side and login screen.

Check if your installation of wordpress updates are (core wordpress, themes and plugins). If so send an email.