ExpressionEngine 2, ExpressionEngine 3, ExpressionEngine 4
Field Pack gives you a handful of useful little fieldtypes. This is the modern version to use.
The MX Notify Control extension allows you to send customized notifications by emails/PMs based on different triggers - new entry creating/updating, member registration, member validation etc..
Embed video is a fieldtype for ExpressionEngine that will give your clients and editors a possibility to add Youtube videos or Flash videos on the publish page.
This little Fieldtype add a dropdown for selecting a MSM site. This way you can create a MSM site where the content editor can select on which site the content is visible.
Supports Matrix, LV, Grid and Content Elements.