Silent Manager

Silent Manager is an app that lets you select a group of contacts to receive notifications from, even when your phone's on silent mode. This means with this app, you can have your phone set to silent but when one or two specific contacts call you, you'll still hear your phone ring.

From the main interface in Silent Manager, you can create as many groups of contacts as you want. When you activate one of these groups of contacts, you can set it so that you always hear their incoming calls or messages, regardless of your phone's current sound settings.

Silent Manager is a really interesting app that lets you keep your Android on silent but still get notified of the things that really matter.